Algorithm for dynamic resource allocation

Hi all,

I am working on dynamic resource allocation problem. I have set of
Consumer and resource. Consumers are with priority (High, Medium,
Low). Now I want to assign resource slice to each consumer based on
priority and no of consumers.

ie
Priority | No of Consumers
---------------------------------------
High | 8
Medium | 5
Low | 2

OR

Priority | No of Consumers
---------------------------------------
High | 1
Medium | 2
Low | 10

My assumption is resource is 100 % and how can I assign slice of
resource to each Consumer based on priority.
Can any body give me idea which algorithm I should use.....

Plenty of ideas here.