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Saturday, 30 November 2013
Friday, 22 November 2013
ISBN Calculations (Check Digit)
During the design stage, the designer has to limit the chances of inaccurate data. Therefore, validation checks have to be established. These checks include:-
1) Range Check: Checks whether data is within acceptable boundaries.
2 ) Length Check: Checks if the data is entered with the required number of characters
3) Character Check: Checks that the data entered doesn't include invalid characters
4) Picture Check: Checks that data is entered...
Evaluation
There, the system has been fully installed and it's up & running. The users of the system are to evaluate the system. During this stage, two key questions will be asked:-
Q1) Does the finished solution meet its requirements?
Q2) Does it solve the problem?
What's the point of a solution which doesn't solve its corresponding problem? Nothin' right? So when these key questions are answered positively, then the system has succeeded....
Implentation
At this point, the system is designed, tested and is ready to be implement it. The thing is, how to do so? Knowing that there are four ways in which you can implement the system. So, which one is the best choice? Like with the methods of recording info back in the analysis stage, there is no black & white rather than it's all shades of grey.
1) Parallel Running: Both the old & the new system will work simultaneously and then...
Development & Testing
The data structures are now designed and now we can move on to the next stage. Let's start with "development". After the data structures have been designed, it's time to create them using the software or programming language recommended by the analyst.
Now that the system is created, what if things don't work out. What if the created system failed to meet it's goals. One thing for sure, it won't look good in the programmer's resumé....
Design Stage
Now that the analyst as all of the information needed recorded, it's the designer's turn. The designer will have to design the inputs & outputs of the system, database stores, process of the system, validation check and test data for the system.
However, the designer has to keep in mind several factors when designing the new system. He has to consider:-
1) The fluency and smoothness of the system, i.e. it should be easy to use, navigate through...
System Analysis
So before anything happens to your system, it has to be analysed. This is the first stage of the SLC, analysis stage. To be clear & simple, system analysis means examining the existing system in detail.
There are four main & distinct ways to collect information:-
1. Examining of Paper Documents
2. Interview
3. Questionnaires
4. Observation
The pros & cons of each can be seen from this table:-
Now,
which is...
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