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To: Analog Kid who wrote (9804)11/29/1997 12:14:00 AM
From: hpeace  Read Replies (1) | Respond to of 97611
 
DM, SMT corps cannot get their act together.
It is a very complicated mat'l logistics problem becasue of high engr'ing change and one bd might have 150 parts.
Those parts all have to be there to start the job . The final assy parts could be late and handstuffed a day later but it's a heck of a mat'l logistics problem and they can't do it right.
Web-based ELM's are helping but the cost is just now dropping on them. Before it was a paradigm that few SMT corps could get by....
paying 200-300k for just the ELM module when all their other systems
put together cost 200k was something they couldn't fathom.
First pass yeilds are too low in many cases. Quality is another issue
entirely
It's a very transaction oriented process and accuracy isn't possible unless you deploy RF scanner technology and a host of other enabling technologies. And, common sense in the stkroom and logistics of moving the mat'l to floor.
I've actually seen SMT mfg'ers return 25 cents worth of capacitors to the stkroom after they broke a job down. So, it cost them maybe
dollars to restk 25 cents worth of parts. And, they do it with thousands of parts per month.
Also, w/o exception all mrp systems are set up wrong for SMT corps.
and the stkroom mat'l logistics is chaos.
I toured a selectron plant once and they actually wrote their own barcode system and had a clerk walking around the stkroom with a scanner that had a 75 ft. cord back to the pc...<ggg>
I asked them wouldn't it be better to use Rf scanners that automatically controlled your actions and the data entry and they said
they didn't know how those worked <ggg>
I said, well if you are going to do it this way put all the parts in the stkroom not in part number order but put in board by ref designator order in a cell where a stk clerk had his own pc and it optimized his moves down to 10 ft. or keep as many as possible stock on the Pick and Place feeders... the repsonse was " we just don't do it that way". My first job was a stkclerk 31 yrs ago while I was a freshman at Texas A&M..we beat Univ. of Texas today...don't care about beating Nebraska...just U of Texas.
I know for a fact that a job with 200 part numbers to pull can be pulled in hours instead of days by doing this.
SMT mfg'ers are going to meet their waterloo someday when they can't charge whatever they want passing their incompetance on to the customer<ggg>

The demand the last 5 weeks is suppose to be recrd breaking...
what you mean is the lull between oct 7th and last week on Nov. which is histroically slow.
But, we are in the USA. Europe is rocking. they are back from vacations and spending money. Last 5 weeks here is the unknown but most