Inaccuracy

I learned many things during my educational life here, among which, this one looks very important: To solve the problems, you do not need to be highly accurate. The less parameter, the faster result.
Many people think that they should include all parameters involved. This, obviously, will make the problem more realistic but less soluble. Just take a look at the number of investigations performed to simulate a condition, an object, whatever. None of them can assure you of giving a final answer to the problem. In fact, sometimes you need to ignore some parameters and add a safety factor to apply your findings to a real situation. Isn't it?
This, of course, will lead to some new results in its turn which can be used for further investigations. Here, I do not believe that computer simulations are redundant works but what I'm trying to say is that, with some simplification we may get results applicable to the real situation. But thinking to many parameters and trying to solve complex systems may not lead to an acceptable result necessarily.
Perhaps that's why H. H. Munro says "A little inaccuracy sometimes saves a ton of explanation".

And this is true even in general life...