JinJin48

SAP Consultant | BTP · S/4HANA · US Global Rollout

June 26, 2026 · 11 min read

SAP QM Sampling Procedure

The Sampling Procedure is the master data object that governs how many items are drawn from an inspection lot and how the acceptance decision is reached. It defines the sampling type (fixed, percentage, 100%, or dynamic), the acceptance and rejection numbers, the AQL level, and whether the inspector or the system evaluates the result. Every Inspection Plan characteristic that requires statistical control references a Sampling Procedure, making it a foundational building block of the entire QM Phase 2 setup.

Part 1: Sampling Procedure — Core Concepts (All Modules)#

1.1 What Is the Sampling Procedure?#

A Sampling Procedure is a reusable master data record that encodes the statistical sampling rules for a quality inspection. Rather than specifying sample sizes and acceptance criteria on every individual inspection, the procedure centralises these rules and allows the same statistical logic to be shared across multiple Inspection Plans and characteristics.

1.2 Sampling Types#

The sampling type determines how the system calculates the number of items to draw from the inspection lot. Selecting the wrong type can expose the company to either systematic under-inspection (quality escapes) or wasteful over-inspection (cost and throughput impact).

Design principle: Dynamic Modification (Type 4) requires a linked Dynamic Modification Rule to be defined first. Without it, the procedure falls back to the baseline percentage table. Confirm the Dynamic Modification Rule is in place before configuring Type 4 procedures in production.

1.3 Organizational Levels and Data Hierarchy#

Sampling Procedure is client-level, defined once and available to any plant, material, or inspection plan. It sits alongside the other inspection masters — Inspection Characteristic, Inspection Method, Dynamic Modification Rule, Certificate Profile — as an independent sibling, not nested under any of them.

It becomes tied to a specific plant and material only when it is assigned inside an Inspection Plan Operation — the same plant-level Inspection Plan / Operation structure used to hold Insp. Characteristics.

Data hierarchy with a concrete example

Client 100
   │
   ├── Sampling Procedure "SP-05"          AQL 1.0 · Level II
   ├── IC "IC-DIA"                          Diameter (quant.)
   ├── Dynamic Mod. Rule "DMR-Q10"          Skip after 10 pass
   └── Certificate Profile "CP-4711"        Outbound QM cert

Plant 1000
   │
   └── Inspection Plan "Group 50 / Cnt 1"   Material 4711
          │
          └── Operation 0010   Incoming Dim. Check
                 ── assigned to ──> Sampling Procedure "SP-05"

Design principle: Keep Sampling Procedures generic and standards-based (e.g., named after the AQL level they implement, not after a product). A small, well-governed set of client-level procedures — reused across many operations — is easier to audit than dozens of near-identical, plant- or material-specific variants.

1.4 Integration with Other Master Data Objects#

The Sampling Procedure does not stand alone. It connects the statistical sampling rules defined in Phase 2 to the Inspection Plan in Phase 3 and drives the runtime behavior of every inspection lot created from that plan.

Part 2: QM-Specific Field Details#

2.0 Scope of QM Ownership#

Legend: ◎ = Owner / Critical, ○ = Direct involvement

2.1 Header Data#

The header identifies the Sampling Procedure and sets its classification within the QM master data landscape. A clear naming convention at this level is critical because the procedure key appears in Inspection Plan printouts and quality records.

2.2 Sampling Type Parameters#

Sampling type parameters are the operational core of the procedure. They translate the chosen sampling strategy into concrete numbers that the system uses when an inspection lot is created.

2.3 Valuation Mode#

The Valuation Mode determines whether the usage decision (accept/reject) for an inspection lot is made by the system automatically or by a human inspector. This directly impacts the inspection workflow and should be agreed with the QM process owner during blueprint.

2.4 Dynamic Modification Link#

When the Sampling Procedure uses Type 4 (Dynamic Modification), a Dynamic Modification Rule must be linked. This rule defines how inspection severity escalates or relaxes based on the history of recent inspection lots for a specific material-vendor or material-plant combination.

What to Read Next#

L1) Big Picture

L2-A) Master Data

L2-B) Transaction