Clearance Suspension Process

Hi Marko,
I have received a tentative job offer today from an agency within DoD with requirement of Public Trust Non-Sensitive Clearance. The job offer is pending on;

  1. Suitability review and adjudication for employment.
  2. Eligibility for a Secret Security Clearance (you must maintain
    eligibility for that clearance).
    I want to know how the Suitability review and adjudication process for public trust is similar/different than the Secret clearance? How long it takes? Any estimates?
    What factors are considered in checking the eligibility for a Secret Security Clearance?