3-4 Month Focused Effort for CPSM Cert
Personally I set a 3 month goal to study and pass all 3 exams. As soon as I passed my first exam I immediately began studying for the next exam. Keeping up this pace made sure that I knew how to study and be in the right mindset to take the test. If you allow too much time between exams you risk losing your exam taking edge. A good 2-3 weeks of concentrated studying for each exam was what worked well for me. Good luck!