SYSTEMS ANALYSIS FORM 4 Included in this topic: Information Systems Systems Analysts System Life Cycle (incl. Case Study) Documentation
SYSTEMS ANALYSIS (Form 4) INFORMATION SYSTEMS
SYSTEMS ANALYSIS (Form 4) Information Systems are made up of two opposing worlds of : INFORMATION SYSTEMS HUMAN ACTIVITY Systems Information Technology AND Combination of resources
SYSTEMS ANALYSIS (Form 4) THE SYSTEMS ANALYST Job description A systems analyst designs new IT solutions to improve business efficiency and productivity. A systems analyst can also design improvements for existing systems. The work might be for an external client or an internal- client (such as a department within the same organization).
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE All things have a : BEGINNING MIDDLE END
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE A new system was introduced and everyone was happy
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Time passed, people moved on, the company changed, and the wonderful system started to show its age.
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE It is difficult to integrate our old system with new systems on the market.
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Online stock verification for our customers is not possible with our system.
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Project selection and feasibility study. Evaluating a proposal Studying the cost Are we going to be more effective? Are we going to be more efficient? Is it solvable?
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Management no agreement. The project can also be halted before it has even started. TIME, EFFORT AND MONEY ARE SAVED Project selection and feasibility study.
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Present system study and analysis. We are going ahead with the project. Analyse current procedures How can we improve them? How can we save time? Analyse the new requests by the user? GET FEEDBACK
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Present system study and analysis. Are we ready for the design stage?
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Design of the new computerised system What output is required? What input is needed? INPUT PROCESSING OUTPUT Data files & Data access methods PROTOTYPING What are PROTOTYPES?
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Design of the new computerised system The use of flowcharts
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Design of the new computerised system Pseudocode
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation FLOWCHARTS PSEUDOCODE SOURCE CODE (ACTUAL PROGRAMS)
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation What about program testing? EXPECTED RESULT = ≠ ACTUAL OUTPUT
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation What do we need to document? USER MANUALS TECHNICAL MANUALS PROGRAM MANUALS
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation USER MANUALS Help to the end-user Printed or online How to use the program/system How to log in? How to print? How to input data? How to log in? How to print? How to input data?
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation TECHNICAL MANUALS Help to the technicians Installation process System requirements Other technical information
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation PROGRAM MANUALS Help to the programmer Modify/maintain the system Future upgrades/maintenance…
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Programming and documentation PROGRAM MANUALS Flowcharts & pseudocode Includes : Source code Test Data Modifications
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Implementation and changeover methods Where are we going to install the system? Do we have all the necessary equipment in place? SOFTWAREHARDWARE
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Implementation and changeover methods What about Staff training? All controls must be Working!! All pieces are working properly together!!
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Implementation and changeover methods NEW SYSTEM OLD SYSTEM Transformation from the old system to the new system Changeover methods
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Implementation and changeover methods Straight Crossover X
SYSTEMS ANALYSIS (Form 4) Parallel Running SYSTEMS LIFE CYCLE Implementation and changeover methods Both are Working together For a period of time Manual/Old System New System
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Implementation and changeover methods Phased Changeover Certain parts of the old system are upgraded gradually. Then another part follows. This changeover takes a long time to be completed. Old System – Part 1 New System – Part 1 Old System – Part 2 New System – Part 2 ……
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Implementation and changeover methods Pilot Run It is a test project!! During a pilot project do as many critical work as possible. Why? Manual/Old System Run the Pilot Project Run the New System
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Control and Review Control and monitor the system Check and regulate if necessary Check standards Check performance Take corrective action when necessary
SYSTEMS ANALYSIS (Form 4) Don’ts Dos SYSTEMS LIFE CYCLE Control and Review
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE Maintenance The system is operating in a live environment Maintenance agreement Troubleshooting Updating Upgrading Redesigning Maintenance agreement Troubleshooting Updating Upgrading Redesigning
SYSTEMS ANALYSIS (Form 4) SYSTEMS LIFE CYCLE 1.Project selection and feasibility study. 2.Present system study and analysis. 3.Design of new computerised system. 4.Programming and documentation. 5.Implementation and changeover methods 6.Control and review 7.System maintenance.
SYSTEMS ANALYSIS (Form 4)