Security Camera Service And Maintenance Programs

I'm new to this community and would like some input from other professionals in the industry.

I have been tasked with developing a surveillance camera service and maintenance program for our clients.

My thoughts on this project is to tier the program into a sliver, gold, plat etc. However, I'd like to know if anyone is currently utilizing this method? How's is it working for your company? Is a blanket plan better? What have you seen that works better? Any feedback would be greatly appreciated.

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