SYSTEM ANALYSIS & SDLC

EXAMPLE INFORMATION SERVICES FUNCTION DEMANDS Demand for increased customer service measured by flexibility, speed, quality, and 24-hour-a-day, seven-day-a-week (called “24/7”) availability. Demand for added functionality by users of an organization’s IT infrastructure. For example, internal users need access to services away from the office and may want to employ new wireless technologies to do so. Implementation of enterprise systems (ES) to connect business processes and better manage the organization. These implementations often require reengineering of the business processes to match them with the processes in the ES. Change in processes and relationships along the supply chain to reduce costs and provide better customer service. These require changes to business processes, IT infrastructure, and IS processes. Use of the Internet and related technologies to collaborate with business partners in ways never before seen.

SOME DRIVERS OF SYSTEM CHANGES Legal requirements, such as government reporting. Level and kinds of competition. Technologies, such as data entry devices, bar codes, and radio frequency identification (RFID) tags used to record and process information. Lines of business or kinds of business activities. Management desire for better access to information and improved management reporting.

ABOUT SDLC The system development life cycle (SDLC) can refer to 1. A formal set of activities, or a process, used to develop and implement a new or modified Information System (referred to below as a systems development methodology.) 2. The documentation that specifies the systems development process referred to as the systems development standards manual. 3. The progression of Information Systems through the systems development process, from birth through implementation to ongoing use.

SDLC CHARACTERISTICS

GENERIC SDLC

SYSTEMS DEVELOPMENT IS A PROJECT A project is an endeavor bound by resources (or, notably, money), schedule (or time), features (or scope)

TRADEOFF TRIANGLE Best take away about project management A change to one side of the “tradeoff triangle” will ALWAYS require a change to one or both of the other sides If you want more features, you must: Add more resources (people) and/or Add more time to the schedule If you want to use fewer resources… If you want the project done sooner…

WHY SYSTEMS DEVELOPMENTS MAY – AND TOO OFTEN DO – FAIL

ORGANIZATIONS VARY IN THEIR SYSTEMS MATURITY

NEW SYSTEMS MEAN NEW PROCESSES – AND VICE VERSA

“MISTAKES WERE MADE”

END OF PRESENTATION SYSTEM ANALYSIS & SDLC