GlossaryKind of term: Manufacturing termDigital thread
What is a digital thread?
A digital thread is the continuous, traceable chain of data about a part, from design and drawing through production to inspection and use.
A digital thread is a way of linking a product's data across its whole life so that each item can be traced back to its source: the tolerance in the model or on the drawing becomes a requirement in the process plan, that requirement a characteristic in the inspection plan, and the inspection report ties back to the same revision. It is not a single software package but a property of how systems and documents are connected.
How does the digital thread work in practice?
Where the chain breaks, data are retyped and an error can slip through unnoticed, for example revision J in the request and revision H in the program. Typical breaks lie between drawing and estimate, between estimate and ERP, and between works order and post-calculation. For estimating, the link between estimated and booked time matters most: you can only compare the two when both belong to the same operation and revision. Model-based definition with PMI can simplify the start of the chain, provided the requirements sit in the model in machine-readable form rather than as presentation only.
What is the digital thread often confused with?
A digital thread is not a digital twin: a digital twin is a virtual representation of a product, machine or process that is updated with data from the real one; the digital thread is the chain of data that can feed such a twin. Nor is it an integration: an integration is one link between two systems, the digital thread runs through all of them, and through the documents.
Frequently asked questions
Do I need a digital thread before I can estimate better?
No. You need the revision per part and the same operation name in the estimate and in the time bookings. That is an agreement, not a system. The chain grows with every link you add.
Where does the digital thread usually break in a machining shop?
Often at retyping: the estimate entered again into the ERP, and the works order carried into post-calculation by hand. In both places an operation can lose its name and an order its revision.