When it comes to contracts administration as a client, what are all the things we have to check in the pre-qualification document?

We need to check following things in the check list.

• Clear and complete qualification documents like registration and vendor approval Reference.
• Clearly filled company information and biding documents.
• Letter of Invitation.
• Scheduled required stander and Technical capability in detail.
• Scheduled required certifications like ISO etc.
• Complete written detail about Manufacturing/Construction capacity.
• Required Quality standards and QA/QC procedure in detail.  
• Legal Claus and terms & Conditions etc.