Howard, now that I'm reading Jorge's response, I did forget to tell you that we run a very high mix, low volume shop and we do not batch build -- we build JIT with much of our product lot sizes based on pre-determined Kanbans, so, we have lots of change overs! Also, what is the goal of decreasing set-up? Is it to decrease throughput time or is it to increase overall machine capacity? -Carrie -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Tuesday, November 05, 2002 6:48 PM To: [log in to unmask] Subject: Re: [TN] Efficiency / Effectivity of your SMT lines Howard, I'd say the run time depends a lot on the type of mix you have. For high to mid volume, 80-90% is typical; for low volume and high mix, if you're at 40-50% you're in heaven. Our facility is high mix and low volume and we never go above 40-50%, more like 40%. It's really nice to think you can get higher efficiencies, but that requires a great deal of management support: accurate production scheduling, enough feeders, no shortages, no component issues, good lot sizes, no last minute changes...and the last thing, would having better time help improve the facility cycle time? many times the SMT lines are pushing product like crazy to then letting it sit at the hand assy/test area due to lack of capacity...remember, the process throughput is mandated by the slowest point on your process...not an easy answer! Jorge -----Original Message----- From: Morse, Carrie [mailto:[log in to unmask]] Sent: Tuesday, November 05, 2002 4:34 PM To: [log in to unmask] Subject: Re: [TN] Efficiency / Effectivity of your SMT lines Howard, We are using the SMED approach and seeing as little as 15 minutes to change over. Of course, changeover time will depend on the line configuration (equipment type, number of machines, number of people and number of reels or magazines that need to be changed) I'm not sure of our actual Run Time, but, I believe it's pretty low -- I've heard grumblings of 20%. This is primarily because we do not keep the machines running all the time (ex: during breaks, during 1st piece insp, etc.). Of course if you have kit shortages that don't show up until you are running, that will kill your efficiency quickly as well as other process issues. In a previous life, we were seeing 30-40% run time on a good week. Typical was about 25% actual run time. Change overs again varied based on size of job (number of reels or magazines) and the number of people available to change over. If you'd like to further discuss specific pieces of equipment and share ideas on SMED please e-mail me offline. -Carrie -----Original Message----- From: Howard Watson [mailto:[log in to unmask]] Sent: Tuesday, November 05, 2002 5:47 PM To: [log in to unmask] Subject: [TN] Efficiency / Effectivity of your SMT lines Dear TechNet subscribers, I am curious about the level of productivity of your SMT lines, particularly for those in a high mix environment. We are getting pressure to reduce changeover and cycle times, as I am sure most of you are too, and I am curious as to what level of effectivity (hours available in the day do you actually build product) that you are at. Would 80% be reasonable? Also, how efficient are you at building your product to standards, for those who track efficiency? As far as changing over from one job to the next, what are your average times? It was suggested to me by management that the goal for changeover should be 1 minute or less. I am a reasonable person, and I believe that single digit (SMED) changeovers, like 8 or 9 minutes might be reasonable, but 1 minute is a stretch that I can't see happening, even when using docking carts for the feeders. Thanks in advance for your input. Howard Watson SMT Manufacturing Engineer --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- AMETEK/Dixson --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------