Estimating software development is notoriously hard and almost always inaccurate. As the other response mentioned, there is the Agile development methodology you can and should look up. It doesn't really help with estimating the entire product development though. You can also lookup the waterfall product management methodology.
Software products are constantly being developed - updates to existing networks, creating new and better tools for different areas of life. Naturally, this requires certain costs, it is quite difficult to calculate software project estimation, because it is very difficult to visually determine the amount of work. As a rule, to understand what costs and risks should be taken into account when creating software, you need to turn to experts in the field of evaluation. On your own it is quite difficult to understand this system, because there are many subcategories in the programs.
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Statistics isn't the subject I major in, but it's still important for my overall academic performance. Everyone says I must ignore it and focus on more valuable subjects, but I can't. I want to be a straight-A student, so this approach isn't working for me. Recently I was assigned a complicated statistics project helper. It became a huge problem for me as a student who understands nothing about mathematics, huge volumes of data, and its processing.