Operator guides
Complete methods for defining requirements, running a search and making a defensible industrial buying decision.
InsightsMiddleman insights
Operating the physical economy.
Serious guides to industrial sourcing, market evidence and the evaluation of agents that act on both. Written for the people who have to make the decision when the record is incomplete.
Industry briefs
Source-dated analysis of supply, maintenance, procurement and the physical constraints behind the market.
Technical notes
How to design, test and govern agents that operate against incomplete, fast-decaying commercial information.
Product notes
What Middleman has genuinely shipped, how it works and what the available release evidence does—and does not—prove.
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Operator guide
Before you quote an exchange unit: define the core return
An exchange price depends on what comes back, when it comes back and whether it can re-enter the repair pool. Put the replacement and returned core on the same quote before a line-down buyer accepts it.
Specialist quoting method · manufacturer sources checked 6 October 2026 · worked example is illustrativeRead noteIndex
Latest notes
Operator guide
The line is down: choose stock, repair or migration before you ask for quotes
A discontinued drive or controller can produce three very different recovery plans. Define the restart deadline, installed baseline and acceptance test before comparing stock, repair and migration as if they were interchangeable quotes.
Operator method · manufacturer sources checked 22 September 2026 · worked example is illustrativeRead noteOperator guide
Before you ask for bids: manifest the surplus spares lot
A cabinet of PLCs, drives and I/O modules is not ready for a buyer because it has a total quantity and one wide photo. Give each unit an identity, condition, evidence trail and release path before you ask the market to price it.
Operator method · sources checked 15 September 2026 · worked example is illustrative · not legal adviceRead noteTechnical note
How to make supplier-feed retries safe
Supplier APIs time out, pages move and jobs retry. A trustworthy ingestion system can replay the same delivery without creating false stock, while preserving genuine price and availability changes as new evidence.
Technical method · sources checked 8 September 2026 · example is illustrativeRead noteIndustry brief
The connected-machine RFQ needs a data schedule
The EU Data Act gives users of connected products new access and sharing rights. Buyers still need to specify the data, interface, retention, permissions and acceptance test before they award the equipment contract.
Industry analysis · EU sources checked 1 September 2026 · not legal adviceRead noteIndustry brief
The listing trap: why industrial buyers lose time on stock that does not exist
A product page is useful evidence of a possible route. It is not proof of present stock, usable condition or authority to sell. Here is how to turn a stale listing into a decision without letting it become a false promise.
Industry analysis · availability still requires verificationRead noteOperator guide
Before you search: write the requirement a supplier can answer
The fastest obsolete-part search often begins away from the search box. A useful requirement resolves the object, operating context, failure, deadline and substitution authority before it asks the market for an answer.
Operator method · examples are illustrativeRead noteOperator guide
Seven metrics for an industrial sourcing pilot that is meant to survive contact with reality
Logins, searches and messages can make a pilot look busy without making sourcing better. Measure whether requirements become answerable, routes become credible and operators reach better decisions without losing control.
Pilot framework · no Middleman performance claimRead noteTechnical note
How to evaluate an industrial sourcing agent before it contacts the market
A polished answer is not evidence that an agent can source safely. The useful test is an end-to-end benchmark built from messy requirements, decaying supply claims, tool use, authority boundaries and the decision an operator actually has to make.
Evaluation design · not a performance claimRead note