Process 3P: Design the Operational Value Stream

Process 3P is where the industrialization focus moves from the product itself to the value stream that will deliver it. Instead of asking “Is the concept buildable?” the main question becomes “How will material and information actually flow from supplier to customer, and which process choices will make or break cost, quality, and lead time?”

This chapter assumes that the product concept is largely shaped and that Design 3P has already surfaced key CTQ/CTC issues and some promising design alternatives. Now the task is to design the operational system that will bring that concept to life.

Process 3P belongs in the window where the product design is roughly 80–90% detailed: the architecture, interfaces, and key components are defined, but small design adjustments are still possible. The big freedom now lies in how the product is built and how flow is organised.

Process 3P is successful when it leaves the team with a clear future-state value stream and a small set of credible process options for the steps that drive cost, quality, and lead time.

Participants need enough context to design the value stream without guessing. Prepare: updated market and engineering requirements (volumes, variants, takt targets), output from Design 3P (CTQ/CTC list, agreed design changes, updated manufacturing concept), any existing process or value stream maps, and a preliminary list of expected capital-intensive, labour-intensive, and quality-critical process steps.

Process 3P lives or dies on whether the people who own and understand the operational side are in the room. Include: process/manufacturing engineers, operations/production leaders, logistics/supply chain, quality and maintenance, and product engineering to handle design–process trade-offs. A typical one-day agenda: present Design 3P outputs and manufacturing concept; map external supply-chain value stream; map internal production value stream; identify knowledge gaps and critical steps; run 7 Alternatives on one or two high-impact steps; capture decisions and actions.

With both maps visible, ask future-state questions: What is the takt time, and can each step meet it? Where do we see unnecessary waiting, transport, or rework? Which steps will drive capital investment? How can we reduce lead time and WIP while still meeting demand and variability? Use these to sketch a first future state that shows proposed process sequence, reduced inventories, targeted lead time, and candidate areas where different process concepts may be needed.

Using the maps, the CTQ/CTC list from Design 3P, and the knowledge gap board, identify process steps where process choice will make or break system performance. Typical candidates: high capital cost operations, operations with high recurring labour content, steps with known yield or quality problems in similar products, long lead-time or bottleneck operations.

For each alternative and each criterion, compare to the baseline using “+” if better, “S” if similar, and “–” if worse. Count the pluses and minuses. Options with clearly more “+” than “–” become candidates for further work.

For the 1–3 most promising alternatives per step, assign follow-up owners to estimate non-recurring costs (tooling, equipment, integration), recurring costs (labour, materials, maintenance), and plan necessary trials or supplier checks. The event’s job is to narrow the field and commit to learning enough to make a good decision — not to finalize all numbers now.

For the future-state concept, estimate: number of lines or cells needed, staffing assumptions by area or station, equipment counts and required uptime to meet takt. Check each major step against takt time and discuss where capacity might be tight or where there is unnecessary headroom. Review how the chosen process alternatives affect capital profile, flexibility to handle volume and mix changes, and risk concentration (single points of failure).

Process 3P sits between Design 3P and Production 3P and depends on both.