GLEN, any thoughts ??????????
Mike...
Seeing as though you asked Mike
, brace yourself :
Being in manufacturing / design for the last 20+ years , what I have experienced is that every company has their own way of doing things . What works for company � A � doesn�t for company � B � and vice versa ��
Typically when parts go through a change because there is a design flaw , unfavorable results from the field , or they found a way to manufacture the part cheaper , the design department will change the revision . Things are not as easy as one might think . For instance :
Widget # 123 is part of a machine that comprises of 24 different components . During development of the machine , each component also goes through changes to get it � just right � . These changes or � revisions � that take place during the design/development stage are on a different identification system than changes that occur during production . A machine can and will have revisions during the production life � you can bet on that �.. not many , but it will happen .
The different revision systems may look something like this :
1) Design/product development stage = numeric ( REV 001 , REV 002 , REV 003 , etc ) This as you can see , leaves room for 999 changes ( revisions ) .
Now , as the machine get developed , each of the components that make up the machine , will complete the design stage at a different revision . Seldom does a designer get all the components right at the first attempt . At this point , the machine now gets ready for production release , at which point all the components that make up the machine are put on the same production revision .
2) After the machine has been fully designed , tested and released for production , the revision system looks like this = alphabetic ( REV A , REV B , REV C , etc )
Now at this stage , all of the components that make up the machine ( as well as the machine ) , are now placed on the same alphabetic revision system starting off with REV A . As you can see , this system leaves room for 26 revisions . If the machine does go through the allotted 26 changes , there is obviously a design flaw to say the least . In all my years designing and/or toolmaking , the furthest revision I have seen on production tooling or widgets is REV F or REV G ��. Typically you don�t seen them any further than REV C or REV D if the design group has done their job correctly .
This can seem very confusing , but this system is developed and used so there is a visible history of the design and product �� For liability reasons also .
This whole revision system falls under the Quality department at every company I have worked for over the years �.
Document Control is the sub � department in the Quality department . These folks are the � proof readers � of sorts . These people give me headaches finding all the details I sometimes over-look . Things like grammer , revision history documentation errors � little things like that .
Once these people stamp the blueprint � released � it is gospel . It is also a chore for this department to make sure that all of the older , no longer valid drawings are purged from the manufacturing floor and the vendors.
Now if there does need to be a revision on a production released component , there is a ECO ( engineering change order ) form that needs to be filled out and submitted �..
To give you the gist of what info is needed to make a change , see the vintage ( Utica , NY ) ECO form that I posted . Forms like that one are a little different today , but the basic idea is the same �.Things like : what are the changes ? , what revision is the part going up to ? , models affected ? , tooling change ? , etc ......
Now that I have explained the process to those who are un-familiar with the steps needed to design/change a part , I will answer the question : should Savage issue a new part number or � rev-up " the existing part number ?
If the part / rifle is released and into production , rev up the part number = #123 REV A is now #123 REV B .
Believe me , it is a lot easier to do this than to add a new part number . Just make sure the machine shop / production floor / vendor gets the latest revision and phase out the old revision .
The serial number of the rifle should tell the customer service folks what parts ( part # , revision # , etc ) have been installed in that particular rifle and who installed each sub assembly , rifle , etc �..
I hope this sheds some insight ..... besides , my fingers hurt
A couple of vintage engineering forms from Utica :