Hi,
I would appreciate any information or pathways (index), on how to write a SOP regarding general criteria for the right way of executing HPLC methods: Including number replicate injection, bandwidth and so on.

Thanks,

Check the following:

http://www.ich.org/ich5q.html
(ICH - Analytical)

http://www.fda.gov/cder/guidance/2396dft.htm
(analytical procedures and methods validation)

http://www.fda.gov/cder/guidance/cmc3.pdf
(reviewer guidance validation of chromatographic methods)