I would take standard times from each operation then just add them all up. After you take some time measurements you will have an average time that it will take. Use these times and just include it for the average of that area then go on measuring other times that are involved for creating...
I am from the Texas area and would recommend plasma cutter. I believe you have to look at cost as well. I have been involved with Ultra high pressure water jettering. The range that I dealt with was 40,000. When you get into water jetting there is more maintenance that the old gas method. I...
One thing that you have to remember.....school vs. the real world analysis. Thats why you get paid to bucks, that sometimes means you being able to do the research for the results that you want.