In general a drawing should have one main view with about two Projected Views. An Isometric View should also be included to give a better overview of what the finished part will look like. More or less views (including Section Views and Detail Views).
All views, except the isometric view, should have at least one dimension shown. If it is advantageous to view a feature from more than one view, con
Dimensions and Tolerances
Before specifying dimensions or tolerances in a drawing, understand how Tolerance Stack-up.