System Analysis and Design IE352 System Analysis and Design Session V

System Engineering Tools System Flow Charts Organization Analysis Organization/Personnel Assessment Engineering Management

System Engineering Tools System Flow Charts

Flowcharts was introduced by Frank Gilbreth to members of the American Society of Mechanical Engineers (ASME) in 1921 In the early 1930s, this tool was started to be embedded into industrial engineering curricula In 1947, ASME adopted a symbol set derived from Gilbreth's original work as the "ASME Standard: Operation and Flow Process Charts Later on, 1970 adapted and used

System Flow Charts Processes flowcharts Work flowcharts Computer flowcharts

Process Flow Chart SYMBOL NAME DESCRIPTION Oval The start or end of a processes Rectangular Process or action step Represents waiting period that is part of a process Diamond Shape When decision is needed, e.g. Yes/No or True/False.

Process Flow Chart SYMBOL NAME DESCRIPTION Solid Thin Arrow Direction of the processes in sequence Solid Line Physical data transfer (editing, recording or writing down) Dotted Line Data Transfer (checking, comparing or reading) Solid/Hollow Thick Arrow Physical Transfer

Process Flow Chart SYMBOL NAME DESCRIPTION Circle Operation Sided Rectangle Files Upward Triangle Open file Downward Triangle Close file

Examples Start File 2 File 1 Receive the request Valid Stamp No Yes Valid Stamp “Rejected” Sign it Open Open File it Record it Close Send to Accounting End Close

System Flow Charts Processes flowcharts Work flowcharts Computer flowcharts

Flow Process Chart SYMBOL NAME DESCRIPTION Circle Operation Arrow Movement Diamond Check Delay Downward Triangle Storage

Examples

System Flow Charts Processes flowcharts Work flowcharts Computer flowcharts

Computer Flow Chart SYMBOL NAME DESCRIPTION Oval The start or end of a processes Semi- rectangular Inputs / Outputs Rectangular Internal processes Diamond Shape When decision is needed, e.g. Yes/No or True/False.

Computer Flow Chart SYMBOL NAME DESCRIPTION Solid Thin Arrow Direction of the processes in sequence Document Single Document Documents Created/Revised Copies Bridge Used to avoid intersections between direction lines/arrows

Calculate Final = (G1+G2+G3..) Examples Start Read class grade n=1 Calculate Final = (G1+G2+G3..) No Yes Final n > X Final n = “FAIL” Final n = “PASS” n = n+1 No n = N Yes Print “Class Result” End