Implementing a new system is an important aspect of system development life cycle.
Implementation is the process of system development life cycle where the users bring the developed system in working condition, it means the developed system starts its work and after this it is handed over to the user.
Conversion is that process of completing all works which as a result hands the new system over to the user.
There is a little difference between implementation and conversion. Converting the
developed system completely into working condition is called implementation. While conversion is an activity of implementation. Implementation includes several activities besides conversion which contain appraisal after implementation and software main-tenance.
Conversion stands for replacing one system with another. Its objects are-activating the tested system and minimizing the conversion cost, risks and the annoyance of the user
The main tasks in the process of conversion are to create files in accordance with the computer, to train the operating staff and to install hardware and terminal.
An important aspect of conversion is that it should not turn an obstacle in the functions of the organisation.
Conversion is the most important and interesting phase of System Development Life Cycle for here is to come out the result of the actions of the designer group.
Usually, the system contains many forms and procedures of the old system, and modification is required to mould it as per the new system.
The new computer system may include some programs of the conversion problems takes place when new equipments are insalled, the input and output of the old pro-gram change or the already created programs are not fit for the new enviornment.
The program might have to be created again, if they are not effective enough.
File conversion is the most time taking and expensive phase in the whole project. The importance of this task is often undervalued.
In the analysis of user training, chiefly two factors are stressed, the ability of the user and the nature of the system being installed. The user may be from naive to conscientious. The developmental research presents extremely interesting facts that what inexperienced users think about their first exposure to the new system. They take it as concrete learners.
Generally, no change within the company is happily accepted by the staff. Specially, when the change is going to influence the whole system, it is natural that it will be resisted.
Post implementation review is a process in which it is determined to which extent the system is functioning well and is capable of fulfilling the requirements of the users.
Software maintenance is the name of the service after sale. As, we purchage any product like refridgerator, computer etc.
Maintenance is neither interesting like system development nor is it more rewarding. It is a work of such class which demands neither skill nor experience.
Maintenance is classified in three ways- corrective, adaptive and perfective. Maitenance stands for improvement in process or function failure. Such sort of maintenance also refers to such changes which had to be made because of some wrong anticipations.
A serious problem with software maintenance is that the nature of its work is labour intensive. It is an error-prone process which is supposed to be a work more costly than writing the program.
Maintenance management audit which evaluates the quality of maintenance effort through interviews and questionnaire.
An integrated approach on determining system documentation and data files and database and system maintainability, reliabilty and efficiency
Such maintenance reduction plans result in more reliable software, less maintenance back-log, time saving in error rectification, enhanced satisfaction of the user and job satisfaction of the maintenance staff.
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