What is scalability ?

What is scalability ? ABSTRACT: The rapid development of large clusters built with commodity hardware has highlighted scalability issues with deploying and effectively running system software in large clusters. The concept of scalability applies to business and technology. In this the base concept is consistent i.e., the ability for a business or a technology to accept increased volume without impacting the revenue variable costs. For example in some cases the variable cost will increase and reduce the revenue variable costs. INTRODUCTION TO SCALABILTY: It is a performance measure for the execution of the software that refers to its ability to accommodate expanding traffic measures like number of users, activity of each user and so on. In telecommunications and software engineering, scalability is a desirable property of system, network, process which indicates its ability to either handle growing amounts of work in a graceful manner or to be readily enlarged. For example, it can refer to the capacity of the system to increase total throughput under an increased load when resources are added. Scalability is generally difficult to define and in some case we define the specific requirements for scalability on some important dimensions. It is a highly significant issue in database, routers and networking. Scalable system is the system whose performance improves after adding hardware proportional to the capacity added is called scalable system. An algorithm, design, networking protocol, program or other system is sad to scale if it is suitably efficient and practical when applied to large situations. If the design fails when the quantity increases then it does not scale. IMPORTANCE OF SOFTWARE SCALABILITY: Software scalability analysis is an important issue for most businesses. It is essential that as the customer base increases, the system has to deal with significantly increased loads, the system is designed to handle the increased traffic so that the users do not encounter unacceptable system performance. Scalability is an important goal for many software development projects and software installations because without scalability success might be hampered by poor performance as observed by end users. MEASUREMENT FO SOFTWARE SCALABILITY: The various dimensions by which the scalability can be measured are: Load scalability: it is the ability of a distributed system to easily expand and contract its resource pool to accommodate heavier or lighter loads. Geographic scalability: It is the ability to maintain performance, usefulness, or usability regardless of the expansion from concentration in the local area to a more geographic pattern. Administrative scalability: The ability for an increasing number of organizations to easily share a single distributed system. Functional scalability: The ability to enhance the system by adding new functionality at minimal effort. DESIGN FOR SCALABILITY: It is often advised to focus system design on hardware scalability rather than on capacity. It is typically cheaper to add a new node to a system in order to achieve improved performance than to partake in performance tuning to improve the capacity that each node can handle. But this approach can have diminishing returns (as discussed in performance engineering). For example: suppose a portion of a program can be sped up by 70% if parallelized and run on four CPUs instead of one. If ÃŽ ± is the fraction of a calculation that is sequential, and 1 − ÃŽ ± is the fraction that can be parallelized, then the maximum speed up that can be achieved by using P processors is given according to Amdahls Law:. Substituting the values for this example, we get If we double the compute power to 8 processors we get Doubling the processing power has only improved the speedup by roughly one-fifth. If the whole problem was parallelizable, we would, of course, expect the speed up to double also. Therefore, throwing in more hardware is not necessarily the optimal approach. WEAK v/s STRONG SCALING: In the context of high performance computing there are two common notions of scalability. The first is strong scaling, which is defined as how the solution time varies with the number of processors for a fixed total problem size. The second is weak scaling, which is defined as how the solution time varies with the number of processors for a fixed problem size per processor. EXAMPLES: A scalable online transaction processing system can be upgraded and can be used to produce more transactions by means of adding new processors, devices and storage that can be upgraded easily. It is also called as database management system. If the size of the necessary routing table on each node grows as O (log N) then the routing protocol is considered as scalable with respect to the network size where N is the number of nodes in the network. The distributed nature of the Domain Name System allows it to work efficiently even when all hosts on the worldwide Internet are served, so it is said to scale well. Some early peer-to-peer implementations of Gnutella had scaling issues. Each node query flooded its requests to all peers. The demand on each peer would increase in proportion to the total number of peers, quickly overrunning the peers limited capacity. Other P2P systems like Bit Torrent scale well because demand on each peer is independent of the total number of peers. There is no centralized bottleneck, so the system may expand indefinitely without the addition of supporting resources. SCALE VERTICALLY v/s HORIZONTALLY: Methods of adding more resources for a particular application fall into two broad categories: 1) SCALE VERTICALLY( SCALE IN): To scale vertically (or scale up) means to add resources to a single node in a system, typically involving the addition of CPUs or memory to a single computer. Such vertical scaling of existing systems also enables them to leverage Virtualization technology more effectively, as it provides more resources for the hosted set of Operating system and Application modules to share. Taking advantage of such resources can also be called scaling up, such as expanding the number of Apache daemon processes currently running 1) SCALE HORIZONTALLY (SCALE OUT) To scale horizontally (or scale out) means to add more nodes to a system, such as adding a new computer to a distributed software application. An example might be scaling out from one web server system to three. As computer prices drop and performance continues to increase, low cost commodity systems can be used for high performance computing applications such as seismic analysis and biotechnology workloads that could in the past only be handled by supercomputers. Hundreds of small computers may be configured in a cluster to obtain aggregate computing power which often exceeds that of single traditional RISC processor based scientific computers. This model has further been fuelled by the availability of high performance interconnects such as Myrinet and InfiniBand technologies. It has also led to demand for features such as remote maintenance and batch processing management previously not available for commodity systems. The scale-out model has created an increased demand for shared data storage with very high I/O performance, especially where processing of large amounts of data is required, such as in seismic analysis. This has fuelled the development of new storage technologies such as object storage devices. TRADEOFFS: There are tradeoffs between the two models. Larger numbers of computers means increased management complexity, as well as a more complex programming model and issues such as throughput and latency between nodes; also, some applications do not lend themselves to a distributed computing model. In the past, the price differential between the two models has favoured scale out computing for those applications that fit its paradigm, but recent advances in virtualization technology have blurred that advantage, since deploying a new virtual system over a hypervisor (where possible) is almost always less expensive than actually buying and installing a real one. CONCLUSION: Scalable system software has become an important factor to the RCF for efficiently deploying and managing our rapidly growing Linux cluster. It allows us to monitor the status of individual cluster servers in near-real time, to deploy our Linux image in a fast and reliable fashion across the cluster and to access the cluster in a fast, parallel manner. Because not all of our system software needs can be addressed from a single source, it has become necessary for us to use a mix of RCF-designed, open-source and vendor-provided software to achieve our goal of scalable system software architecture.

Father and Son Relationship, Angela’s Ashes Essay

One of the strongest things in this world is the love that forms between a father and his son. Many boys grow up with the desire to be just like their fathers but for Frank McCourt having an alcoholic father causes him to grow up with the mentality of being the opposite of him. In Angela’s Ashes the interesting relationship between Frank and Malachy creates positive and negative impacts on Frank’s life. At times, Frank despised his father for drinking the dole money but he knew that in the morning he would have his father to himself. Sitting on his father’s lap and hearing stories about Cuchulain was what made Frank feel loved. Although Malachy managed to make his son feel special, the sufferings that were caused by him made negative impacts on Frank’s life. One of the positive impacts that Malachy created for Frank was the Cuchulain story. Cuchulain symbolized Malachy’s fatherly side which only happened when he was sober. Cuchulain was something that Frank shared with his father which made it extremely special for him. He hold on to the memories he spend with his father and no matter how mad Frank was at Malachy he knew that the best thing to do was hold his anger in and not put their relationship in danger, â€Å"My heart is banging away in my chest and I don’t know what to do because I know I’m raging inside like my mother by the fire and all I can think of doing is running in and giving him a good kick in the leg and running out again but I don’t because we have the mornings by the fire when he tells me about Cuchulain and DeValera and Roosevelt and if he’s there drunk and buying pints with the baby’s money he has that look in his eyes Eugene had when he searched for Oliver and I might as well go home and  tell my mother a lie that I never saw him couldn’t find him† (McCourt 185). Frank knows his father’s addiction is what made the family suffer. The special moments that Frank created with his father was what stopped him from kicking him in the leg. Although Frank saw his father drink his little brother’s money, it was Frank’s love toward his dad that made him walk away from the pub. Malachy’s addiction affected the way Frank solved his problems. Since Malachy was always out in pubs it created a negative impact on his relationship with Frank. When Frank got troubled for hearing the word â€Å"piss† he turned to the Angel on the Seventh Step for help instead of his father. Malachy’s drinking often causes Frank to distance himself away from him during times where he was in need. Since Frank noticed that Malachy’s fatherly side only came out when he was sober he decided to seek help somewhere else. When he received help from the angel, Malachy felt the feeling of being denied by his son, â€Å"All right. Tell the priest if you like but the Angel on the Seventh Step said that only because you didn’t tell me first. Isn’t it better to be able to tell your father your troubles rather than an angel who is a light and voice in your head?† (McCourt 125). Malachy ruined the relationship he had with his son the moment he picked alcohol over his family. He turned his back to his family when they needed him the most. Frank was affected by his father’s addiction at an early age. Watching his father come home at night shaped Frank’s perspective on life. He often referred Malachy as the Holy Trinity because of his various attitudes, â€Å"I think my father is like the Holy Trinity with three people in him, the one in the morning paper, the one at night with the stories and prayers, and then the one who does the bad thing and comes home with the smell of whiskey and wants us to die for Ireland† (McCourt 210). Frank always found a way to have pity over his father but when he move to England, Frank no longer felt pity over him but anger. The moment Malachy stepped foot in England was the moment where Frank grew anger towards him. He was furious at his dad for being selfish and  causing his family to go through starvation. The negative impact that Malachy created caused Frank to get a job as a telegram boy. Since he was a lot older his mentality started changing towards his father. He no longer looked as his father as the one who made him feel special through the Cuchulain stories but as a selfish father who spent money on drinks. Malachy’s bad actions caused Frank to grow up with the mentality of being the opposite of his father. The bad example that Malachy demonstrated benefited Frank because it showed him what a man is not suppose to do.

Palmers Limited Case Study

Cost's they overlook the quality. While BC tries to look pretty to their customer, Cost pay less attention to their look and more to provide the lowest prices for their members. From 1997 to 2001, Wall-Mart store numbers were increased by 53, Bi's stores went up by 50, but Cost went up by 91 . Cost's business strategy Is very simple, â€Å"To generate high sales volumes and rapid Inventory turnover by offering members very low prices on a limited selection of nationally branded and select private-label products In a wide range of merchandise categories† (Thompson, 2008) .They have able to implement this strategy very successfully. They have also been very successful in making their customer believe that product is a better quality than their competitors, interestingly their competitors in most cases don't carry the same kind of product. Cost's marketing strategy is simple yet effective, the idea of providing the lowest price and good quality product is a strategy to be reckon with. Plus there marketing idea of â€Å"Treasure Hunt† has allowed them to saved tons of money from broad advertisement.After a membership base Is established In an area, most new memberships came from word of mouth. This simple marketing and advertisement strategy has allowed Cost to keep Its marketing expenses low relative to those at typical retailers, discounter, and supermarkets. Cost is also known for its price strategy. They have become a master in providing top quality products even including some brand products at the lowest price possible to their customers.Instead of marking up their cap to 20 or 50 percent like their competitors they decided to cap their mark up to only 14 percent, which itself a key element in Cost's pricing strategy. This also indicates that Cost is trying to do what it takes to please their customer to increase their profits so they can make their shareholders happy at same time. It's this price strategy that has allows Cost to only only make profit over the year, but Increase their member to $110. Cost's product selection strategy Is also very Impressive. Unlike their competitor who carry from where from 40000 to 1 50000 SKU items , Cost decided to selecting Ana prove only auto mess I en last Includes everyday Items sun as kitchen supplies, Electronics, health and beauty products, automotive supplies, gasoline, games, cleaning supplies, canned goods, Food. They categories their product in commercial and professional use. Plus, Cost's treasure hunt merchandising strategy is also an attention grabber. Out of the 4000 items on the floor about 1000 were the treasure hunt product, meaning their prices with constantly changing.In most cases these were higher end products like furniture and TV. Cost's growth strategy is also quite remarkable. On average they have been opening about 20 to 25 new stores each year. Most of them in American but some internationally as well including; Canada, Korea, I-J, Japan, Canada, and Mexico. In recent year they experimented by opening independent Furniture store to sell high end bigger furniture items which resulted in good success. Later rather than opening more stores they instead added extra space about 45000 square feet to the Cost it self and called it Cost Home.Now the furniture category has become on of the tope 5 selling items on Cost's website. They are very innovative when it comes to their warehouse and management strategy. Cost's CEO, Jim Senegal, quoted, â€Å"Cost is able to offer lower prices and deter values by eliminating virtually all the frills and costs historically associated with conventional wholesalers and retailers, including salespeople, fancy buildings, delivery, billing, and accounts receivable. We run a tight operation with extremely low overhead which enables us to pass on dramatic savings to our members†. They stored the inventory on racks above the items being sold in the warehouse. That reduced their labor cost and saved them a lo t time on handling and stocking. They treat their manager as entrepreneur and allows them to decide what item should be sold in their store. They adored most of the inventory directly from the manufactures. It either came directly to the store or went to their distribution center called crosschecking depots. The point of these depots were to reduce the transportation cost by making sure all truck are full when they come the store.As an investor I wouldn't would want to invest in a company that has a good reputation, consistently growing, good sustainable growth, and good future plans. Let's talk about sustainable growth rate, which basically means that a firm can grow while keeping its profitability and financial policies unchanged. Sustainable growth model allows us to segregate reasons or changes that have led as a company to substantial growth so at the same time we can segregate the causes for those change. It is represented in four steps.

How to Conjugate the Verb Uscire in Italian

Sensitive Information on Essay Topics about the Columbian Exchange That Only the Pros Know About

Sensitive Information on Essay Topics about the Columbian Exchange That Only the Pros Know About The Battle Over Essay Topics about the Columbian Exchange and How to Win It Potato is among the absolute most important crops on the planet. The planting of a totally new crop to the area will increase the food creation, which then increases the population. Maize was the main grain of the American Indians in 1491, and it's one of the most crucial grain sources on the planet at this time. Maize, squash, and tomatoes also play a major part in the cuisine. There were not many methods for getting healthful and nutritious food. One of the absolute most important things which were exchanged in this time was tobacco. This list is made up of all the key meats America consumes today. Cost-free Columbian Exchange essay samples can be found FreeEssayHelp with no payment or registration. Tobacco was among the luxury goods which was spread as a direct consequence of the Columbian Exchange. Diseases was a main part of the Columbian Exchange for numerous explanations. Life, Death and Essay Topics about the Columbian Exchange This was an important difference and was the main reason for most of Native American deaths. Within this circumstance you're able to approach SameDayEssay. In addition, the document explains the excellent uses of horses and the way they allowed for faster travel and people to resist from a greater level. While we may get an image they were the very first merchants to accomplish this, the easy reality is that they we ren't. The Little-Known Secrets to Essay Topics about the Columbian Exchange Many people were made to convert religions as a result of this demand. Because of the increase in trade, they relied on cheap forced labor to keep up with the demands. The Natives were rather impressed with their very first meeting with the Europeans. People were also travelling to distinct areas around the world. Farmers were now learning different practices and the way to grow unique crops. The exchange had a social effect on the Indian community as a result of mixing and interaction of people from other pieces of the planet. Among the most well-known architectures that came from the fair was the Farris Wheel. It is essential that one must realize is that though the materials which were exchanged might have been a rise in both cultures, it's incomparable to the manner by which the individuals of the New World were mistreated. This has been shown to be an extremely powerful and speedy approach to aid with a writing assignment and find the business done properly. To begin writing your assignment you would want to run into an interesting and promising topic. As our group of writers is pretty big, we always have free writers eager to bring a manageable and well-paid purchase. Therefore, many students and employees decide to get affordable essay rather than writing it themselves. Writing quality essays is the principal purpose of our services. Whether you must create a paper of one-of-a-kind flawlessness, just get an essay here and our writers will provide help. Citations and extracts from assorted sources have to be formatted properly. Together with the topics, you'd discover loads of papers at no cost. The Americas was separated from the remaining part of the world for thousands of years and had developed in various ways from Europe. After De Soto left the nation, no European returned for at least 100 decades. Columbus had no clue what he had created. Whether Christopher Columbus was a great man, the explorations which he conducted were the start of that which we now call the Americas. How to Get Started with Essay Topics about the Columbian Exchange? This contact led to the spreading of diseases. Despite the fact that the population grew, the amount of the indigenous folks in America was decreased due to the presence of diseases. This is just one disease that had an awful influence on the Native Americans. Another positive component of it addresses the domesticated animals that we consume today. The book was very tough to follow because of the quantity of information offered in each chapter. Still, every one of them would show up in the overall list. Actually, prior to making an order you'll be able to find a price quote on your essay. The only real issue with the book was the sum of information given.

The Ethical Dilemma of Midwives of Women Who Choose to...

Women who choose to bottle fed becomes a ethical dilemma for midwives In this essay, we will be discuss the ethical dilemma, which midwives have to deal with, when a woman choose to bottle-feed their babies, who do not have any medical requirement not to breastfeed. In addition, why bottle-feeding their babies is the women choice. Why breast-feeding is, better for mother and baby than bottle-feeding. Women who choose to bottle-feed. Woman who choose to bottle-feed their babies, can decide why they bottle-feed, through a number of factors. The womans age; her level of education; her cultural background, this can all help her decide to bottle-fed, for example if she was brought up on formula and her friends and family all bottle-fed†¦show more content†¦Breastfeeding for just 2 months reduces the risk of developing epithelial ovarian cancer by as much as 25%. Breastfeeding reduces the risk of severe bleeding postnatal by aiding contraction of the uterus and as the mother uses up more calories when breastfeeding she will benefit by losing weight at a faster rate and thus return to her pre-pregnancy size sooner. Breastfeeding also protects against osteoporosis and hip fractures in later life. Psychosocial effects of breastfeeding are enhanced bonding and infant attachment and a reduction in perceived stress. Breastfeeding is more convenient, as you do not need to clean and prepare, and it is always available where ever you are. Breast milk is free so there is no added cost. Over all breast-feeding, is benefit to both mother and babies. When it becomes an ethical dilemma for midwives When a women choose to bottle fed, the midwife that dealing with her will find this as a ethical dilemma as it known that breast feeding, it’s not only best for mothers but also best for babies too, that the advantages for breastfeeding far outweighs the advantages for bottle feeding. Women have informed choice, on how they fed their babies. Midwives can advise to breast fed their babies but that is as far as it goes. It would be an ethical dilemma as the midwives has no other choice but to support the mother bottle-feeding. Conclusion Breast-feeding is the main choice of food, to give to aShow MoreRelatedNestle Swot Analysis5622 Words   |  23 Pagestheir homes and provide samples of formula. These activities encourage mothers to give up breast feeding and resort to bottle feeding because it is the fashionable thing to do or because people are putting it to them that this is the thing to do. THE DEFENSE The following points are made in defense of the marketing of baby formula in Third World countries: . First, bottle carry states Nestle argues that the company has never advocated feeding instead of breast feeding. All its products a statementRead MoreProject Mgmt296381 Words   |  1186 Pagesdoctorate in operations management from the College of Business, University of Oregon. He is certified Scrum Master. v â€Å"Man’s mind, once stretched by a new idea, never regains its original dimensions.† Oliver Wendell Holmes, Jr. To my family who have always encircled me with love and encouragement—my parents (Samuel and Charlotte), my wife (Mary), my sons and their wives (Kevin and Dawn, Robert and Sally) and their children (Ryan, Carly, Connor and Lauren). C.F.G. â€Å"We must not cease from exploration

Recruitment Strategy for Good Life Health Clubs - myassignmenthelp

Question: Discuss about theRecruitment Strategy for Good Life Health Clubs. Answer: According to Cascio.2018 here are several activities that impact the effective performance of an organization. Recruitment plays a very crucial role in the proper functioning of an organization. Poor decisions made when recruiting employees greatly affect the performance of an organization. This limits the rate at which goals are achieved. The best strategy to recruit a pool of suitable candidates for a fitness director position and the basic materials that can be used in an actual campaign. Acquiring the best talent is very critical to the success of Good Life Health Clubs. Poor decisions made when recruiting may end up producing long-term negative effects for the company hence its competitive edge and share of the market will be lost. The current job market has become very competitive and the available skills have been diversified thus recruiters need to be more selective in their choices Analoui(2007). According to Sun.2007 current marketplace has experienced so many changes as compared to some two decades ago. The market begun with a general theme and later evolved to the specific needs of the consumer. The employer has the chance to target the message to a specific group of people who best suit the job vacancy through the targeted job board. In this scenario, targeted recruitment is the best way to go since it gives the company the opportunity to pay for specific applicants who were arrived at after the postings were targeted. This is different to the case where you pay the entire multitude yet many of the candidates are not qualified. When used, the target recruitment strategy offers the company so many advantages. First and foremost, it is the most economical way a company can achieve their goals. It also enables the company to attract a wide slate of candidates for the advertised vacancy. Lastly, target recruitment enhances the diversity of the workforce and the employment bra nd. For Good Life Health Clubs to get the right applicants to fill the fitness director vacancy the best way to go is through the target recruitment so as to get the best candidate for the job. To target specific people for the job, the company can focus the advertising and recruiting efforts and tailor the message content so as to attract a given segment of the labor market Costen(2012). This approach is also beneficial since the company does not need to recruit a large number of employees but instead the company is looking for a person who can fill the single position of a fitness director. In order for the company to get the best employee, recruitment should be done externally. External recruitment is when the organization decides to fill the vacancy from any suitable applicant outside the business. External recruitment is advantageous in that; the company is able bring people with new ideas, get a large pool of candidates from which they can be able to get the best candidate and lastly the company will be able to get applicants who have a wider range of experience. When done externally, recruits can be found through; magazines and journals, newspaper adverts, encouraging walk-in applicants and through audio and visual media. Posting vacancies through the media reaches a wide number of individuals and In turn increases the number of potential candidates that can be chosen to fill the vacancy. This method may seem expensive to the company but it is very advantageous since it maximizes the number of interested individuals that are reached in a short period of time Schule rJohnson(2012). For a successful formal recruitment, the company must have the right job specifications and the right advertising strategy to lure the correct employees. This is made possible by having the right software and technology that can effectively handle the advertisement. The technology can help the company keep the records of all those involved in the interview and use it for future employment opportunities with the business. Social media is a great channel of reaching out to the job seekers. Facebook, a platform used by billions of people, can be the best way to reach out to interested individuals. An advertisement can be done on the Facebook account run by the organization clearly stating the necessary requirements for the position in this case is recruitment of fitness director of Good Life Club. With this in mind, the company will be able to reach out to interested applicants who have been closely monitoring its operation. Twitter also plays a great role in advertising job vacancies since it also has a large number of followers. The company can use individuals with many followers to advertise the vacancy or use their own platform to pass out the information. The advertisement can also be done through the website of the company thus allowing potential candidates to learn about the vacancy before deciding on whether to apply or not. In order to reach out to the relevant applicants, the company should carry out its on recruitment. Involving recruitment agencies is not the right option since they may end up choosing individuals who do not have the correct qualifications. People with greater knowledge of the job should be used to carry out the interview so as to appoint a person with the best qualifications. The interviewer should have all the necessary knowledge about the position and ask questions proving that can determine whether the applicant is fully aware of the job being applied. To recruit their own employees, the company should follow a proven recruiting process. The following steps should be followed; first is to develop accurate job descriptions , compile a success profile , draft the advertisement describing the position and the key qualifications required then to post the advertisement in the relevant media ,develop a series of phone screening question .Next is to review the received resumes and identify the best candidate. Lastly is to select candidates for assessment. For the company to effectively reach out to the applicants, a realistic job preview should be put in place. Through this preview, the employee is provided with a realistic view of what the job entails. The applicant can be able to determine whether they are a good match for the advertised job or whether they do not fit the job description. Current employees can hold a meeting and create the Realistic Job Preview. They can then decide on the best way to distribute the RJP to the labor market. Distribution in the form of a written material is the most preferred since it is cheaper and can be able to reach a large number of individuals. The RJP should be introduced early in the recruiting process so that applicants can get information about the job earlier enough Reece(2010). In addition to development of the suitable recruitment strategy there is the need of the application of job description, job specification and competence-based analysis. Good Life Health club needs a fitness officer who is able to run the business professionally and successfully also he or she can be able to train and develop other fitness professionals according to their needs. The fitness director should also make sure that the members in the club are serviced with all their health and fitness needs. According to the qualifications of the director; he or she should have a diploma in TAFE ,3 years fitness professional experience and have knowledge of operating the machines and equipment. In addition the director should have organization, people and good communication skills. Based on the competence based analysis the director should contribute to the financial position of the club, good management, provision of quality and efficient services and good overall performance. A good recr uitment strategy will keep in mind the three items in the selection of suitable candidates for the job Draganidis(2006). References Analoui, F., 2007.Strategic human resource management. International Thomson Business Press. Boxall, P. and Purcell, J., 2011.Strategy and human resource management. Palgrave Macmillan. Cascio, W., 2018.Managing human resources. McGraw-Hill Education. Costen, W.M., 2012. Recruitment and selection.The Encyclopedia of Human Resource Management: Short Entries, pp.379-387. Draganidis, F. Mentzas, G., 2006. Competency-based management: A review of systems and approaches. Information Management Computer Security, Volume 14, pp. 51-64. Heneman, HG, Judge, TA Kammeyer-Mueller, JD 2015,Staffing Organizations, 8th Edition, McGraw Hill. Huselid, M.A., 2015. The impact of human resource management practices on turnover, productivity, and corporate financial performance.Academy of management journal,38(3), pp.635-672. Rees, G. and Rumbles, S., 2010. Recruitment and selection.Rees, G. and French, R. Leading, Managing and Developing People, pp.169-190. Schuler, R.S. and Jackson, S.E., 2012. Linking competitive strategies with human resource management practices.The Academy of Management Executive (1987-1989), pp.207-219. Sun, L.Y., Aryee, S. and Law, K.S., 2007. High-performance human resource practices, citizenship behavior, and organizational performance: A relational perspective.Academy of management Journal,50(3), pp.558-577.