My Very Simplistic Project Scoping Math

Let R = the duration of the Requirements process in effort (e.g. person hours).

Then, a solid Design process generally trends towards 3R;

The Coding process typically trends towards 2R (assuming good Requirements and Design);

And the Testing process trends towards 2R as well.

So for a generic project, after properly gathering Requirements, overall effort could be estimated at ~8R.

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