A lot of programmers are still using the waterfall methodology today despite the fact that there are now a lot of other methodologies to follow in their practice. The reason for this can be summarized in 4 key points.
Why waterfall methodology?
First, it is linear and sequential. Hence, the phasing of each and every activity is defined and identified since every step or phase has a unique goal that is essential for the completion of the project.
Second, it is easier to implement even if the programmer is pretty new because the requirements are separated into 2 – the design and development requirements.
Third, at the end of each phase, a document is required as an output and this document is essential for the communication or the connection of the 2 phases.
Fourth, it is simple to follow. As mentioned earlier, even newbies will be able to get it because of its linear and sequential properties.
In every program, it is normal to commit errors considering the long codes that are involved. What is good about this methodology is that it allows the programmer to cycle back and correct whatever errors there were in the programming. Because of its nature, there are certain situations wherein it is best to use the model.
When is best to use the waterfall methodology?
First, when the project development is based on the mainframe or if it is transaction oriented, there is no model as suitable as this methodology. When the project is large with enough budgets allocated for it, a lot of IT professionals opt for the waterfall model because it leaves less room for mistakes since correction is integral to the process.
One thing users must know is that it takes time for the program to be complete. This is because it is built in such a way that the programmer cannot move on to the next step if the step prior to that is not yet completed. In addition, testing is part of every phase and so it takes time to finish. When it is completed though, one can be assured that the program works very well. Hence, if you have time before implementation, this methodology is definitely the method to use. If the project is rushed and the team members are pressed for time, this will not be an advisable method.
Your team members may be inexperienced but that is not really a concern with waterfall methodology. Because the whole process is sequential, for as long as they can follow each and every step, they should be able to execute things correctly and the program will be up and running as if it is done by a professional.