I have a server which its initial capacity is 2. But the server (an oven) will start working just when its fed with two entity. It means first entity must be waited in the server till next entity being transferred into. Then the server initiates the process.
How can I use this logic ?
(The model is uploaded: I want server 3 start whenever 2 entities are placed in, not just for first-in entity)
http://dibadata.com/rhamzei/Server%20Process%20Logic.rar