Public Management Information Systems System Design Monday, July 01, 2019 Hun Myoung Park, Ph.D. Public Management & Policy Analysis Program Graduate School of International Relations

System Development Life Cycle Investigation (planning) Systems analysis Systems design System development Systems implementation System maintenance

System Design 1 Logical and functional designs Defines input/output requirements (forms and reports) Design user interfaces and dialogues Design database/storage (data dictionary) Specifies H/W, S/W, and networking (telecommunication) PERT (Program Evaluation Review Technique)

System Design 2 System controls (I/O, process, database, telecommunication personnel control) Rules and procedure (security, privacy, data integrity, and backups--recovery). Described in request for proposal (RFP) specifying required resources (H/W, S/W) PERT (Program Evaluation Review Technique)

Data Flow Diagram 1 A picture of the movement of data between external entities and the processes and data stores within a system Data flow (arrow) Process (work or actions) Data store in rectangular Source/sink

Data Flow Diagram 2 Context diagram or level-0 diagram Overview of an organizational system that shows the system boundaries, external entities that interact with the system, and the major information flows between the entities and the system Level-n diagram is a data flow diagram that is n nested decompositions from a process on a level-0

Data Flow Diagram 3 Data flow allows only one direction Data flow from and to data store means retrieving and updating information Process (verb) has to have input and output Data store must be moved by a process Source/sink

Context DFD

Level 1 DFD

Context DFD

Level 0 DFD

Flowchart

Highlights Emphasis on reliability, security, privacy especially for contracting out projects Importance of documentation in all stages.