Unknown Processes

Unknown processes are recurring physical activities on a plant or warehouse floor that sit outside the designed standard flow. Process engineers document receive, put away, kit, and return paths. The live hall still invents side jobs: lifting a maintenance tech to work at height, looping around a broken door, restacking off-spec supplier packaging, or towing a failed tugger. Drivers absorb the minutes. The value stream map never grows a box for them.

These are not random one-offs when they repeat across shifts. They become unpaid capacity loss. A plant that ignores them thinks logistics has spare time for the next volume ramp. Continuous RTLS monitoring flags unexpected movement so the side job gets a name, a frequency, and a cost. That cost decides whether to absorb the work from time to time or invest in dedicated equipment, repairs, or a redesigned path.

Unknown processes differ from IT process mining deviations. Process mining finds variants in system event logs. Unknown physical processes often create no transaction at all. They live between scans, which is why location history matters.

Key Components

Designed standard flow: The planned routes and times process engineering and lean teams use for capacity and staffing.

Unexpected movement: Paths, stops, or dwell that do not match expected corridors and zones on the live map.

Pattern label: A plain name for the side job (height assist, door detour, off-spec restack) so it can enter a budget talk.

Frequency and duration: How often the pattern hits and how many minutes each event costs, usually over two or more weeks of continuous monitoring.

Absorb versus invest decision: Keep living with rare cheap events, or fund equipment, repairs, or redesign when the monthly cost exceeds the fix.

Applications in Manufacturing and Logistics

Internal logistics teams use continuous location to catch forklifts that regularly leave material lanes for maintenance height work. Once the minutes are totaled, the case for a dedicated lift or platform is a number, not a complaint. The same method prices door and aisle faults that force long detours until facilities repairs them.

Process and industrial engineers use the patterns to update standards that a daytime gemba walk missed. Night-only habits show up on spaghetti and heat maps even when no engineer was on site. That feeds cleaner capacity models and fewer false assumptions about spare mover time.

On a twin used for internal logistics optimization, unknown-process detection sits beside utilization and shift load views. The goal is the same: make hidden floor work visible enough to fund the right fix.

Benefits and Challenges

The benefit is an honest cost picture. Plants stop treating chronic side jobs as free driver goodwill. Rare events stay absorbed. Expensive repeating patterns justify scissor lifts, door repairs, layout changes, or clear ownership in maintenance. After the investment, the same map verifies that the unexpected dwell or detour actually disappeared.

The challenge is judgment. Not every odd stop is waste. Some assists are correct teamwork. Alert rules need zone and path context so normal dock work does not look like an unknown process. Teams also need agreement that the goal is funding fixes, not blaming the driver who answered the radio.

Related Terms

RTLS supplies continuous location. Dwell time highlights stops outside the plan. Spaghetti diagrams show detours. Process mining finds system-log variants that may pair with physical unknowns. TCO frames the invest decision. A digital twin holds the shared map used to cost and verify the pattern. KPIs such as cost per unknown process per month keep the choice concrete.

Frequently Asked Questions

Are unknown processes the same as waste? Often they create waste, but some are necessary until a better tool exists. The point is to see and cost them so the plant chooses absorb or invest on purpose.

Can a weekly gemba walk replace continuous monitoring? A walk catches what happens while someone is watching. Many side jobs peak on nights or after a door fails mid-week. Continuous location covers the hours nobody walks.

What accuracy do you need? Medium-precision location (about 1–3 m / 3–10 ft) is enough to see unexpected halls, mezzanine edges, and detour loops. Sub-meter (~3 ft) accuracy is not required for costing a repeating side job.

When should a plant invest instead of absorb? When frequency and duration over a few weeks make the monthly cost higher than the dedicated equipment, repair, or redesign that removes the pattern.