3. Programmers
Highly trained technical specialists who write
computer software instructions.
System Analysts
Specialists who translate business problems and
requirements into information requirements and
systems, acting as liaison between the information
systems department and the rest of the
organization.
4. Information System Managers
Leaders of the various specialists in the information
systems department.
End Users
Representatives of departments outside the
information systems group for whom information
systems applications are developed.
6. 1.การวิเคราะห์ปัญหา (Systems Analysis)
The analysis of a problem that the organization will try to
solve with an information system.
Feasibility Study
As part of the systems analysis process, the way to
determine whether the solution is achievable, given the
organization’s resources and constraints.
Technical Feasibility, Economic Feasibility and
Operational Feasibility
Establishing Information Requirements
–การแสดงผล
–การนาเข้าข้อมูล
–การประมวลผล
–การติดต่อกับผู้ใช้งาน
System Development Life Cycle : SDLC
10. 2. การออกแบบโปรแกรม (Systems Design)
Details how a system will meet the information
requirements as determined by the systems analysis.
Logical Design
Lays out the components of the information system and
their relationship to each other as they would appear to
users.
Physical Design
The process of translating the abstract logical model into
the specific technical design for the new system.
The Role of End Users
2.1 ผังงาน (Flowchart)
»ผังงานระบบ (System Flowchart)
»ผังงานโปรแกรม (Program Flowchart)
2.2 รหัสลาลอง (Pseudo Code)
28. Conversion
The process of changing from the old system to the
new system.
Parallel Strategy
A safe and conservative conversion approach in
which both the old system and its potential
replacement are run together for a time until everyone
is assured that the new system functions correctly.
Direct Cutover Strategy
A risky conversion approach in which the new system
completely replaces the old one on an appointed day.
29. Pilot Study Strategy
A strategy to introduce the new system to a limited
area of the organization until it is proven to be fully
functional; only then can the conversion to the new
system across the entire organization take place.
Phased Approach Strategy
Introduces the new system in stages either by
functions or by organizational units.
Conversion Plan
Provides a schedule of all activities required to install a
new system.
