If you are refering to maintenance applications, I would try to consider what is needed. Are there fixtures that need to be replaced from time to time?
J, if I were you, I would determine the scope of work myself, and set the terms under which you will enter into contract. The variables are many, but some examples would be show up times, minimum charges, overtime rates, etc., etc.
Before any of the above takes place you need to determine how much work this contract is going to provide your company for the duration of the contract. Then, you need to determine how much it will cost your firm to perform said work (when I say cost, I mean every penny associated with the work in question). If, J, you can determine how much it all costs, then, my friend, you will be able to easily determine how much to charge (margin) the customer. Remember the Proverb, "A wise man, before he buildeth a tower, he counteth the cost."
Wattological Regards,
Doc
