[step-manufacturing] EXTERNAL: Re: [EXTERNAL] Reminder: UUIDs for the digital thread

Wed Apr 24 10:27:01 EDT 2024

Jan and others,

If we consider a digital thread actually to be more like a traditional thread compose of many strands or fibers where each strand has a use case, rather than a monofilament line of one use case, then we gain the flexibility to characterize the wide variety of “digital thread” concepts and applications. Since I think we agree that few object systems are likely to have only one digital twin in practice, then this thread of stands orientation gives us a handle for composing digital twin specific threads as strands of a larger and more comprehensive systemic digital thread.

Cheers,

Richard

From: step-manufacturing <step-manufacturing-bounces at steptools.com> On Behalf Of jan.de.nijs at lmco.com
Sent: Wednesday, April 24, 2024 9:53 AM
To: Rencher (US), Robert J <robert.j.rencher at boeing.com>; Martin Hardwick <hardwick at steptools.com>; step-manufacturing at steptools.com
Subject: Re: [step-manufacturing] EXTERNAL: Re: [EXTERNAL] Reminder: UUIDs for the digital thread

Great discussion. Thanks for the input.

My thinking remains that there is exactly 1 digital thread per use case. Define the use case for me, and I will tell you what the digital thread has to be. I am stuck on this idea that the thread defines which data elements are needed to implement a specific use case.

So yes, if you agree that there are “n” use cases, then it is likely that there are “n” digital threads (although I think that there are many use cases that share the same digital thread).

I have a slide deck where I actually prove that point. “Simple” maintenance insights can be derived straight from an MTConnect stream. No need at all for UUID’s, part numbers, serial numbers, quality data. But just an MTConnect stream is never going to get you OEE. You need many more data elements for that. And for things like dynamic scheduling and (my favorite) causal analytics, you need many more again. There is an effort at UKentucky to look at DT’s of the cutting process to specifically quantify subsurface damage, which requires a completely different set of data elements. Again, IMO, proving the point that digital threads are use case dependent.

Jan.

From: step-manufacturing <step-manufacturing-bounces at steptools.com <mailto:step-manufacturing-bounces at steptools.com> > On Behalf Of Rencher (US), Robert J
Sent: Wednesday, April 24, 2024 8:31 AM
To: Martin Hardwick <hardwick at steptools.com <mailto:hardwick at steptools.com> >; step-manufacturing at steptools.com <mailto:step-manufacturing at steptools.com> 
Subject: EXTERNAL: Re: [step-manufacturing] [EXTERNAL] Reminder: UUIDs for the digital thread

Hello Martin,

There is a continuing discussion regarding the number of digital threads.  One perspective is there is only one digital thread.  This one digital thread is the system that facilitates interoperability between disparate systems across the product lifecycle.  The other perspective is that there are “n” number of digital threads representing the respective workstreams or value streams utilized throughout the product lifecycle.

Both of these perspectives have advocates in the industry and both have valid arguments.   From my perspective the one digital thread approach lacks the depth and detail needed to align with the utility of the one digital thread.  

I have a conflict today with PLM AG.  I’ll try and jump on to this during a break.

Robert

Dr. Robert J. Rencher, D.M.
Sr. Systems Engineer, 
Associate Technical Fellow 
Enterprise Engineering 
The Boeing Company
PH: (206)295-0887
email:  robert.j.rencher at boeing.com <mailto:robert.j.rencher at boeing.com>  

"Vision without effort is day dreaming, effort without vision is drudgery" 

From: Martin Hardwick <hardwick at steptools.com <mailto:hardwick at steptools.com> > 
Sent: Wednesday, April 24, 2024 5:09 AM
To: Rencher (US), Robert J <robert.j.rencher at boeing.com <mailto:robert.j.rencher at boeing.com> >; step-manufacturing at steptools.com <mailto:step-manufacturing at steptools.com> 
Subject: Re: [EXTERNAL] [step-manufacturing] Reminder: UUIDs for the digital thread

EXT email: be mindful of links/attachments.

Hi Robert,

I agree there should only be one thread, but because of the digital twin composition, there is a transition between manufacturing and engineering that must be managed.

Martin

On 4/23/2024 2:29 PM, Rencher (US), Robert J wrote:

Hello Martin,

Thank you for sharing the diagram.  I would suggest an alternate labeling for the engineering and manufacturing digital thread.  The generalization of digital thread introduces the categorization of thread types, i.e. “engineering thread”.  If the attempt is to be discrete in assigning a label to a digital thread then a descriptive label that easily identify the purpose/use of the digital thread should be used.  Digital Threads align data/information with sequence(d) events/tasks/objectives.  A UUID could be assigned to a digital thread to identify the discrete digital thread use event.

Robert

Dr. Robert J. Rencher, D.M.
Sr. Systems Engineer, 
Associate Technical Fellow 
Enterprise Engineering 
The Boeing Company
PH: (206)295-0887
email:  robert.j.rencher at boeing.com <mailto:robert.j.rencher at boeing.com>  

"Vision without effort is day dreaming, effort without vision is drudgery" 

From: step-manufacturing  <mailto:step-manufacturing-bounces at steptools.com> <step-manufacturing-bounces at steptools.com> On Behalf Of Martin Hardwick
Sent: Tuesday, April 23, 2024 11:08 AM
To: step-manufacturing at steptools.com <mailto:step-manufacturing at steptools.com> 
Subject: [EXTERNAL] [step-manufacturing] Reminder: UUIDs for the digital thread

EXT email: be mindful of links/attachments.

All,

We will review organizing principles for the digital thread.

Martin

Topic: UUID's for the Digital Thread
Time: Apr 24, 2024 09:30 AM Eastern Time (US and Canada)
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Martin Hardwick
President STEP Tools, Inc.
Cell: 518 253-0596
"The sticky tape wizards"
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