From a customer's perspective, never say you can do it NOW if you can't. Better to lose one customer that just can't wait than risk losing them all from over committing yourself.
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I understand where your coming from, but the nature of our business makes us take on all the work we can, its seasonal, everybody else is in the same boat I'm in, well you could say everbody is backed up, and they are, and customers will just have to wait till we can get to them, and thats what happens, but if I could come up with a better way I sure would like to know to keep my customers happy and coming back for more.
BigMack
I agree 1000% with that thought. Overcommitting leads to a miriad of problems no matter what the line of work.
Could charging a premium for rush jobs and offering a discount for more flexible scheduling be a possibility? Let the customer decide if he really needs the job done right away if it's going to cost him x% more.