Correções

I have learnt that in any diploma or research work statement of problem and purpose of research is extremely important.

Purpose, problem and tasks are not only standard cliché for the introduction part of diploma.

If the aim and problem of diploma (or any research) is right, there is no place for questions like "Hmmm, what is next to do?" When purpose of research is clear it is easier to plan work, to make accents and appoint time for working steps.

Clear purpose helps to underline tasks.

As a matter of fact making clear tasks is the framework of the all diploma work and long- and short-term planning and time-management.

If we pay attention to the aim of our research, all parts of diploma are logically fitted to each other.

And certainly conclusions and results of our work should fit to the purpose of our research that we claimed in the introduction of the diploma.