What step they follow to optimize a site?
Have a look on this site
which is growing very fast in the field of SEO, and I believe that it will fulfill your requirement.
The reason behind is that
1.They do analysis of site which includes
META Description and Keywords Tags
Site navigation structure
Page load time
Delivery And Load Time
Internal Search Engine for site
Consistency of Design – how the consistency of design is maintained and how style sheets are be used.
Visuals And Layout
Use of Color
Use of font
Use of text
Use of graphic and optimization
Contact Address Bar
Bottom KW rich PunchLine
Standard company E-mail response
Crawler friendliness and Directory structure
Page length and Page size
3.Web Page Optimization
5.Analytics & Action Plan