Quoting: How much info is enough?

06/23/2011

In the Olden Daze an RFQ was simple. "Design and build a tool to produce parts" with some kind of a capacity level. You gave your answer in time and costs and all was well. Now, it ain't so.

There are two classic methods of quoting a tool and parts.

"The squinty eyed" approach - you taped the design to the wall and the Guru stares at it, sometimes for hours. Then an epiphany happens. In a flash of brilliance, he comes up with the overall cost and timing. All without (perhaps) consideration for equipment loading, available personnel, shop loading and the other things that ended up as excuses on why the project wasn't on time.

"The accounting method" - here with a little algebra the number of cavities was determined along with a budgetary cycle time to support the production requirements, then a proximate materials list was developed using as many catalog components as possible. Lastly the tricky part - Scheduling: How would the mold be constructed? Who will do the design? What machines would be used? Do we EDM or CNC the cavities? What about cooling? What machines are already booked doing other work when this project will need them? Should we sub out some of the work? With all the hours calculated, then they would multiply through the machine rates and labor hours. Add the two totals and you get costs. Look at the schedule and you get delivery time....
Read more


www.k-online.de