What is my site ranking dependent on? ?

Site ranking tends to be "cumulative" and is dependent on the following factors:
The specific keyword phrases (search terms) that have been targeted e.g web design dubai
The overall competitiveness of your industry - how many players are there
Whether you are targeting a regional, national, or international market
How well ranking is monitored and the site tweaked over time for SEO improvement
The progress of your reciprocal linking campaign
number of competitor sites achieving new ranking themselves.