How does APS-ME handle same-day OEM forecast changes?

APS-ME re-sequences the production schedule without requiring a full MRP regeneration cycle. When an OEM sends a revised call-off, APS-ME evaluates the impact on capacity, material, and competing demand and produces a revised schedule within minutes — not the next planning cycle. The system works from real capacity data, not planning averages.

We run production for multiple OEMs simultaneously. Can APS-ME handle that?

Multi-OEM scheduling is one of APS-ME's core use cases. Each OEM's demand stream is managed independently with its own scheduling constraints and delivery requirements, then resolved against your shared capacity and material simultaneously. Tier suppliers running three to five OEM customers on the same shop floor is a configuration Lake has implemented many times.

We already have SyteLine. Can we add APS-ME without disrupting production?

Yes. APS-ME is added as a module within your existing SyteLine environment — it works with the APS license you already own. We run parallel planning alongside your existing process for 2-4 weeks before cutting over fully, so there is no cold-start risk. The implement-or-optimize methodology applies whether you are starting APS for the first time or fixing a configuration your schedulers have stopped trusting.

Factory worker assembling machined cylinder head components on production conveyor (AI-generated)

Automotive Tier Suppliers · SyteLine ERP

Your OEM Customer's Forecast Changed Again. Your Schedule Has 6 Hours to Catch Up.

Tier 2 and Tier 3 automotive suppliers don't get planning cycles — you get call-offs that revise daily, multi-OEM release schedules running on shared capacity, and scorecards that don't grade on a curve. APS-ME turns SyteLine's existing scheduling module into a system your planners actually trust. The rest of the Trak-Suite captures what happens on the floor, controls what goes to the OEM, and tells you whether the program is still making money.

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The Problem

Why OEM Scheduling Volatility Breaks Standard ERP

OEM release schedules change faster than MRP can regenerate

When a revised call-off comes in from your OEM, MRP runs on last night's snapshot. The gap between your plan and your floor grows every hour your schedule isn't updated — and schedulers who don't trust the system build a parallel spreadsheet to compensate. That spreadsheet is where real scheduling decisions get made. Your ERP becomes a recording device for what already happened.

Variant complexity multiplies across your finished goods and sub-assemblies

A vehicle program that shipped three option combinations five years ago ships eight now. Every variant is its own demand stream, its own BOM, its own PPAP package. Flat MRP logic resolves this to an average that fits none of them — so the wrong material gets pulled, the wrong revision hits the floor, and the planning team spends its week manually sorting what the system should have sorted automatically.

Multi-OEM scheduling creates competing priorities your system can't sort

When two OEM customers send revised forecasts on the same day, someone in your building decides which jobs get material and which work centers get capacity. Right now that's a spreadsheet and a senior scheduler making judgment calls in real time. The ERP doesn't know about the conflict until one of those jobs is already late — and the scorecard already knows before you do.

APS-ME + Trak-Suite for Automotive Tier Suppliers

APS-ME

APS-ME is a proven implementation program for SyteLine's existing APS module — built for the OEM release management reality your schedulers actually face. When an OEM sends a revised forecast, APS-ME re-sequences against your real capacity and competing demand without waiting for the next MRP cycle. The implement-or-optimize methodology works whether you've never run APS or have a setup that schedulers have stopped trusting.

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Shop-Trak

Real-time labor capture across multi-mode production — job shop, repetitive, JIT/JIS lines, and aftermarket service all on the same SyteLine instance. Actual machine cycle times and operator-level floor data flow into APS-ME's scheduling logic and Fact-Trak's program costing. When planners and schedulers trust the floor data, they stop maintaining the parallel spreadsheet.

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Fact-Trak

On-time delivery analytics by OEM customer, by part, by work center — program margin visible while the work is still in progress, not reconciled at month-end. Tier supplier scorecard penalties become visible at the program level before the next shipment goes out. Fact-Trak's live dashboards incorporate posted and unposted entries and drill through to the source transactions behind any margin variance.

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Doc-Trak

Engineering change management for the variant complexity Tier suppliers actually run. When an OEM design change flows in, Doc-Trak propagates the updated revision to every active job referencing the affected part — automatically. PPAP packages and APQP submission documents attach to ERP records by part number and customer, so your audit trail is current without manual reconciliation.

See Doc-Trak