Answer:
The remaining step in the system development process translates the solution specifications established during systems analysis and design into fully operational information system. There concluding steps consist of programming, testing, conversion, production, and maintenance.
Programming
The process of translating the system specifications prepared during the design stage into program code.
Testing
The exhaustive and through process that determines whether the system produces the desired results under know conditions. Testing information can be broken down into three type of activities: unit, system, and acceptance testing. Unit testing, or program testing, consists of test each program separately in the system. System testing test the functioning of the information system as whole in order to determine if discrete modules will function together as planned and whether discrepancies exist between the way the system actually works and the way it was conceived. Acceptance testing provides the final and management certification that the system is ready to be used in a production setting.
Conversion
Conversion is the process of changing form the old system to the new system. Four main conversion strategies be employed: the parallel strategy, the direct cut over strategy, the pilot study strategy, and the phased approach strategy.
Parallel strategy a safe and conservative conversion approach where both the old system and its potential replacement are run together for a time until everyone is assured that the new functions correctly.
The direct cut over a risky conversion approach where the new system completely replaces the old one on an appointed day.
Pilot study a strategy to introduce the new system to 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.
The phased approach strategy introduces the new system in stages, either by functions or by organization units
Production and Maintenance
After the new system is installed and conversion is complete, the system is said to be in production. During this stage the system will be reviewed by both user and technical specialists to determine how well it has met its original objectives and decide whether any revisions or modifications are in order. Changes in hardware, software, documentation, or procedures to production system to correct errors, meet new requirements, or improve processing efficiency are termed maintenance.
