System Development Life Cycle
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Short Answers
- System Development Life Cycle involves to plan, create, test, and deploy processes of an information system (Hatley & Pirbhai, 2013).
- The parallel execution utilizes the new and the old systems to that point where the new system gets full verification. The olds immediately stop being used by the plunge implementation and start using the new system. Pilot implementation involves the conversion of only a group of users to the point of verification of the new system. Only a portion of the system is converted by the phased implementation before it is verified.
- Component-based development is a system that emphasizes on creating blocks that are small and self-contained that can be used across a variety of application in an organization over and repeatedly. On the other hand, a service-oriented architecture emphasizes on creation, use, and repeated use of codes that are self-contained and small referred to as services to achieve the needs of the software application of an organization.
- One of the advantages of self-sourcing is that it creates to the knowledge workers a sense of project ownership. It leads to quicker development of systems and increases the expertise of the knowledge workers in the determination of business requirements.
- The Service Level Agreement is the legal and binding contract in business operations. It spells out the characteristics of the proposed system, cost of the system, development time, acceptability, criteria for breaking the contract, and all other legal regulations within a contract (Wu & Buyya, 2012).
- The foundation material requirement planning systems of ERP was introduced in the 1970s. The next stage was the MRP II that entailed the addition of decision support and executive system. Integration of the functions of finance and accounting took place in 1990s. Currently, we have the ERP II which integral functions are the customer relationship and supply management.
- In decentralized infrastructure sharing of IT and related resources are limited or not present at all while in the centralized infrastructure, IT and its related resources are shared completely from a centrally controlled location.
- 1-tier (presentation) is the first type, followed by 2-tier that entails application, data, which is 3-tier, and lastly business logic, which is n-tier (Tehrani, Uysal M.,& Yanikomeroglu, 2014).
- A Business Continuity Plan is a guideline structured step-by-step to give disaster recovery process of a business or a continuation of disruption of its operations (Snedaker, 2013).
- A disaster recovery plan cannot be implemented prior to testing it before the implementation of the plan.
References
Hatley, D., & Pirbhai, I. (2013). Strategies for real-time system specification. Addison-Wesley.
Snedaker, S. (2013). Business continuity and disaster recovery planning for IT professionals. Newnes.
Tehrani, M. N., Uysal, M., & Yanikomeroglu, H. (2014). Device-to-device communication in 5G cellular networks: challenges, solutions, and future directions. IEEE Communications Magazine, 52(5), 86-92.
Wu, L., & Buyya, R. (2012). Service level agreement (SLA) in utility computing systems. IGI Global, 15.
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