Henrique,
Before you throw some software at the problem, have you got a manual system that works??
Have you got that many suppliers??
As long as you have the quantity of suppliers to justify the database management, then fine.
If you have a manual system with your selection and evaluation criteria defined, then the easiest way would be to lay this out using Excel to generate your "table" and then using the Access wizard, import this table into Access.
It is not quite as easy as that and some refinements will be required, but you could be up and running within a couple of hours.
I have no real knowledge of database creation but even I can get what I require PDQ......so it cant be that difficult.
Give it a go..............
Regards,
Chris