CN20 - Chapter 20 Systems Design Implementation and...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 20 Systems Design, Implementation, and Operation 1 FOSTER School of
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Overview The last four phases (2-5) in SDLC: 1. Systems Analysis (Chapter 18) 2. Conceptual Design 3. Physical Design 4. Implementation and Conversion 5. Operation and Maintenance FOSTER School of 2
Background image of page 2
Overview Questions to be addressed in this chapter include: What are the activities that take place in the conceptual design phase of the systems development life cycle (SDLC)? What activities take place in the physical systems design phase? What happens during the systems implementation and conversion process? What activities occur in the systems operation and maintenance process? 3 FOSTER School of
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Introduction Accountants must understand the entire systems development process, because they are involved in several ways: Helping to specify their needs. As members of the development team. As auditors after the fact. Accountants also help keep the project on track by: Evaluating and measuring benefits. Measuring costs. Ensuring the project stays on schedule. FOSTER School of 4
Background image of page 4
CONCEPTUAL SYSTEMS DESIGN In the conceptual systems design phase, a general framework is created for implementing user requirements and solving the problems identified in the analysis phase. The three main steps are: Evaluate design alternatives. Prepare design specifications. Prepare the conceptual systems design report. FOSTER School of 5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CONCEPTUAL SYSTEMS DESIGN Evaluating design alternatives There are many design decisions that must be made. For example: Should a document be hard-copy or sent by EDI? Should the company use a large centralized mainframe or some form of distributed processing? What form should data entry take, e.g., keyboard, optical character recognition, POS devices? Data storage medium, structure, file access? Frequency of updates? FOSTER School of 6
Background image of page 6
CONCEPTUAL SYSTEMS DESIGN Also, there are many ways to approach the systems development process: Packaged software In-house development End-user development Outsourcing The company also chooses between: Modifying or enhancing existing software Replacing existing software FOSTER School of 7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CONCEPTUAL SYSTEMS DESIGN Prepare design specifications Once a design has been selected, the project team develops the more detailed conceptual design specifications for the following elements: Output (prepared first to meet user’s needs) Data storage (what data, type of file) Processing procedures and operations FOSTER School of 8
Background image of page 8
DESIGN Prepare the conceptual systems design report A conceptual systems design report is prepared at the end of the conceptual design phase to: Guide physical system design activities. Communicate how management and user
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 42

CN20 - Chapter 20 Systems Design Implementation and...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online