Modelsim simulation steps and flow chart?

Hello people!

Anyone who has read the manual for simulating using Modelsim has seen the flowchart below regarding the development cycle of a Quartus II project:

https://www.alteraforum.com/forum/attachment.php?attachmentid=7818

my questions involve only the functional simulation cycle.

The list of questions is:

1. After we start coding and reach a semi-final stage that need to compile and simulate functionality, what kind of compilation do we need to do? Do we need to do full compilation or just analysis and synthesis?

2. After the compilation is finished do we need to do another compilation in Modelsim? If yes which file(s) do we need to compile?

3. If the simulation results are not satisfactory (in terms of functionality) and we need to come back to develop some more code, again we need to make the above compilation in quartus. After that what actions do we need to do in Modelsim? Do we need to compile again in modelsim? In case we already have created a .do file with forced clocks and signals, is just a restart enough? or we need to create the whole signal list with the forced inputs again?

Thanks a lot!!