Motiwalla_ch04

Motiwalla_ch04 - CHAPTER 4 DEVELOPMENT LIFE CYCLE 1...

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1 CHAPTER 4 DEVELOPMENT LIFE CYCLE
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2 Learning Objectives Review the Systems Development Life Cycle (SDLC). Examine the problems and alternatives with SDLC. Know the key issues in ERP implementation strategy. Understand ERP Implementation Life Cycle. Examine the rapid implementation methodologies. Compare and contrast SDLC and ERP Life Cycles. Examine the role of people like top management, consultants, and subject matter experts (SMEs) in the ERP Life Cycle.
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3 Preview There are various technical and organizational challenges in implementing ERP systems depending on the organization, scope of implementation, business processes, and skill level of the end users. The System Development Life Cycle (SDLC) provides useful guidelines to the ERP implementation process. Discussion on the key phases of the ERP life cycle with emphasis on roadblocks in each phase and solutions available to overcome these roadblocks
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4 Systems Development Life Cycle (SDLC) SDLC includes a systematic process of planning, designing, and creating an information system for organizations. It is often better to have a structured methodology to avoid mishaps and coordinate the design and development tasks properly among the members of a large systems development team. Systems Approach—Complex problems are broken up into smaller manageable problems using a systems’ hierarchy, and then developing a solution for each problem within the hierarchy.
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5 Figure 4-1 Traditional SDLC Methodology
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6 SDLC Phases Investigation Phase Thorough analysis of the costs and benefits Analysis Phase Determine the user requirements of the new system focusing on the problems of the current system. Design Phase Focus is on the new system’s architecture, user interface, and reporting requirements. Blueprint or technical specifications of the new system. Implementation Phase Acquisition of hardware, software, development of custom applications, new system testing, training, and data conversion
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7 Figure 4-2 SDLC Approach
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8 Rapid SDLC Approaches Prototyping This approach does not go through the analysis and design phase. It implements a skeleton or a prototype of the actual system with a focus on data input and output. The idea is to demonstrate the system functionality to the users. Feedback is incorporated into the new system and demonstrated back to the users. This approach has proven to be very effective with user interactive systems because the prototype is eventually converted into a full-scale system. End User Development (EUD) Users are trained to develop their own applications.
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9 Figure 4-3 Prototype Development
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10 Differences between ERP and Other Software ERP Other Packaged Software Millions of dollars Hundreds to Thousands Mission critical Support or productivity improvement One to several years Almost instantly Requires significant change management strategy from beginning to end for success; business process
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Motiwalla_ch04 - CHAPTER 4 DEVELOPMENT LIFE CYCLE 1...

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