System Design, Implementation and Review

Systems Design: Systems design is the process of defining the architecture, components, modules, interfaces, and data for a system to satisfy specified requirements

Logical Design Output design: types, format, content, frequency Input design: types, format, content, frequency Process design: calculations, comparisons, manipulations File & database design: capabilities and organization Telecommunications design: high-level network description Procedures design: automated & manual

Physical Design Hardware design Software design Database design Telecommunications design Personnel design Procedures and controls design MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan

Systems Implementation

Systems Implementation

The Programming Life Cycle

Reasons for Maintenance Changes in business processes Requests from stakeholders, users, or managers Errors in the program Technical and hardware problems Corporate mergers & acquisitions Government regulations Changes in the operating system or hardware

Systems Review

Types of Review Procedures MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan

Factors to Consider During Systems Review Mission Goals Hardware/software Database Telecommunications IS personnel Control Training Costs Complexity Reliability Efficiency Response time Documentation

Summary Systems design - preparing detailed design needs for a new system or modifying an existing system Systems implementation – installing the system and making everything, including users, ready for its operation Software - can be purchased from vendors or developed in-house - a decision termed the make-or-buy Systems maintenance - involves checking, changing, and enhancing the system to make it more useful in obtaining user and organizational goals Systems review - the process of analyzing systems to make sure that they are operating as intended