Wow, where do I begin. We currently have 9 designers on our team, thus any one at any time could end up working a design they did not start. We structure our projects and folders to be the same, so everything is easy to find. The company has a design, manufacturing and test process document and deviating from the "norm" requires a deviation to the checklist, which travels with the each design. Also, if a design requires something unique to that design its document right inside the design with a "Design_Intent" or "Design_Notes" property. Reports are generated within the CAD tools capturing these items, so the history is contained within the layout. Other items that keep someone new to a design from going off the rails are also built into the design, such as stackups, constraint rules, embedded mechanical transfers, keepouts, and the trusty design checklist. If you need to deviate, you need to document.
I could go on and on, but you get the drift that this keeps most us from unintentionally messing up the original design intent.
Hope this helps.
Colleen
Colleen Salvaggi, C.I.D.+
Supv. PCB Design
Bose Corporation
The Mountain
Framingham, MA 01701-8863
508-766-6520
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-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Steven Roy
Sent: Thursday, June 09, 2016 2:30 PM
To: [log in to unmask]
Subject: Re: [DC] Design knowledge and experience capture?
Hello, (I'm not sure if my original post got sent out correctly, so I apologize if this is a duplicate)
Great topic William!
I would agree with Ben's comment. We utilize a document (spreadsheet form) titled the "PCB Pedigree" that is scalable and contains exactly this kind of information, so that it doesn't get lost 1 or 2 (or even 5) years down the road! Our document is easy to use and has specific "checkboxes" that indicate areas of the design that have been changed or that were affected by the changes...as well as what to be careful of when making future changes to the design.
Thanks...
Respectfully,
Steven D. Roy, CID+
PCB Designer / ECAD Librarian
Server Technology Inc.
(775) 284-2000 x-508
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-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Brooks, William
Sent: Thursday, June 09, 2016 9:00 AM
To: [log in to unmask]
Subject: [DC] Design knowledge and experience capture?
I've seen a need and desire to address an age old challenge in the design and manufacturing of electrical and electromechanical machines and circuits.
This is mainly regarding the capture of the experience and knowledge of the designer so that future edits to the design are not done in a way that inadvertently compromises the integrity of the design and creates issues with an existing product that were not issues before.
Many of you I'm sure, have experienced making changes to an existing design that is in production. Typically there is a need to change something due to an obsolete or discontinued part. Someone completely unfamiliar with the design may make assumptions about it from looking at the schematic and the board and not actually see all the potential impacts from making a simple change to the layout or circuit.
Many of the circuits we create have an integral relationship to the function of the circuit... Parts placement, arrangement, circuit trace widths and proximity to other traces or circuit groups, trace widths, thermal vias, stitch vias between planes, proximity of components, sensitive traces or components, high voltages and safety margins for spacing, diff pairs... etc. The list can be long...
Some of us add notes in the design to warn future designers, who will be asked to make changes in the circuit, of WHY the circuit is laid out the way it is...
I'm thinking that we need a better way to capture the knowledge and experience of the design intent and archive it with the design in such a way that if someone else needs to take it over they have all the knowledge they need to manage it at their fingertips. If you do this, how do you go about doing it in your organization?
Thanks,
William Brooks, CID+
Printed Circuit Designer
2747 Loker Ave West
Carlsbad, CA 92010-6603
760-930-7212
Fax: 760.918.8332
Mobile: 760.216.0170
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