IMDS and PPAP: How Material Compliance Fits Into Part Approval

For automotive suppliers, IMDS is not a separate compliance task that can be completed whenever the quality team has time. IMDS material data is part of the evidence needed to support part approval, and incomplete or rejected material data can delay PPAP.

The practical challenge is coordinating the two workflows:

This becomes more difficult when parts contain multiple materials, supplier-submitted MDSs, GADSL-relevant substances, recycled content information, or customer-specific requirements.

Where does IMDS fit into PPAP?

The Production Part Approval Process (PPAP) is used to demonstrate that a supplier's production process can consistently produce parts meeting customer requirements.

IMDS serves a different purpose: it documents the material composition and relevant regulatory information associated with automotive parts.

The two processes meet because the customer needs confidence in both:

• the part itself, through the PPAP process
• what the part is made of, through material disclosure

AIAG notes that IMDS is directly connected to PPAP and that IMDS information is required for participating automotive OEM supply relationships.

That means an IMDS submission should be treated as part of the part-approval workflow rather than as an isolated environmental-compliance activity.

What does IMDS provide for PPAP?

An IMDS Material Data Sheet (MDS) provides structured information about the materials and substances contained in a component.

Depending on the part and customer requirements, this can include:

• component and material structure
• material composition
• substance information
• regulatory information
• GADSL-related declarations
• recycled-content information
• relevant additional regulatory fields

The important point for PPAP is that the MDS creates traceable material evidence behind the part being approved.

A supplier may have dimensional reports, process documentation and inspection results ready for PPAP, but if the required material declaration is missing or unacceptable, the approval package can still be incomplete.

Some OEM and supplier requirements explicitly state that missing material disclosure documentation can delay PPAP approval.

The IMDS-to-PPAP workflow

A practical workflow looks like this:

1. Identify the part and customer requirement

Start with the part number, customer, programme and applicable submission requirements.

The supplier should establish early whether the customer requires:

• IMDS
• CAMDS
• FMD or another material declaration
• customer-specific substance information
• additional compliance evidence

This should happen during the programme rather than immediately before PPAP submission.

2. Collect material information from suppliers

The supplier often does not have complete material information internally.

Data may need to come from:

• raw-material suppliers
• moulders
• platers
• coating suppliers
• electronics suppliers
• sub-tier component manufacturers

This is where PPAP and IMDS can begin to diverge operationally.

The quality team may be progressing toward part approval while the compliance team is still waiting for material information.

A missing supplier declaration can therefore become a PPAP timing problem, not just a compliance-data problem.

3. Build or receive the IMDS MDS

The material information is structured into the IMDS hierarchy.

The MDS needs to represent the part accurately, including the relationship between:

component - material - substance

The structure and composition need to make sense for the physical part.

Incorrect hierarchy, incomplete material composition or missing substance information can create problems during validation and customer review.

Regilient's existing analysis of IMDS data-quality problems highlights examples such as incorrect material structure, missing GADSL-declarable substances and weight inconsistencies as common reasons for rejected submissions.

4. Validate before PPAP submission

One of the biggest process improvements is to validate IMDS data before it becomes a PPAP blocker.

Validation should check areas such as:

• material composition
• weights
• material classification
• substance information
• GADSL requirements
• regulatory information
• required fields
• customer-specific requirements
• consistency with the actual part

The objective is simple:

Do not discover an IMDS problem after the PPAP package is already waiting for approval.

5. Submit the material information with the required PPAP evidence

Once the MDS has been checked and accepted according to the applicable customer process, the relevant IMDS information can be incorporated into the PPAP workflow.

The exact evidence required varies by customer and programme, so suppliers should follow the applicable OEM or Tier-1 requirements rather than assume that one universal PPAP package exists.

For example, supplier manuals can explicitly require IMDS information as part of the PPAP package.

What causes IMDS-related PPAP delays?

The problem is rarely just "someone forgot to submit IMDS."

The underlying issues are usually earlier in the data chain.

Supplier data arrives too late

A supplier cannot create an accurate MDS without sufficient material information.

If requests begin shortly before PPAP, there may not be enough time to collect, validate and correct the data.

The MDS does not match the physical part

An MDS can technically exist while still being unsuitable for approval.

Examples include:

• incorrect component hierarchy
• incorrect material weights
• incomplete composition
• incorrect material classification
• outdated supplier information

GADSL information is incomplete

GADSL-related information needs to be considered as part of the material declaration.

A missing or incorrectly declared substance can trigger additional review or rejection.

This is particularly important because GADSL is not simply a list that sits outside the IMDS process; its requirements influence how automotive material information is declared and assessed.

The IMDS submission is treated as a last-minute task

This is perhaps the most preventable problem.

If IMDS begins after the engineering and quality teams have effectively finished the PPAP package, compliance becomes a bottleneck.

The better approach is to make material-data readiness a programme milestone.

What should be checked before PPAP?

A useful internal readiness check is:

The purpose is not to turn PPAP into an IMDS checklist.

It is to make sure that material compliance evidence is ready when the part is ready for approval.

IMDS does not end when PPAP is approved

This is another important distinction.

PPAP approval does not mean that the material data can simply be archived and forgotten.

Parts change.

For example:

• material suppliers change
• raw materials change
• coatings change
• component substitutions occur
• BOM quantities change
• manufacturing locations change
• engineering revisions are introduced
• regulatory requirements change

Supplier quality and compliance teams therefore need a way to determine whether a product or MDS needs to be reviewed again.

Supplier processes can explicitly require updated material data following changes to dimensions, materials, weight, coatings, BOMs, suppliers or other production characteristics.

This is where the connection between PPAP, engineering change management and IMDS becomes important.

The real problem: disconnected workflows

The traditional workflow can look like this:

The difference is not simply better IMDS knowledge.

It is workflow coordination and data visibility.

How automotive teams can make IMDS part of the PPAP process

A more reliable process should give quality, engineering, procurement and compliance teams visibility into the same material-data status.

For each part, teams should be able to determine:

• Has supplier material data been requested?
• Has the supplier responded?
• Is the MDS complete?
• Has it passed validation?
• Are there GADSL or other regulatory issues?
• Does the MDS correspond to the current part revision?
• Has the customer accepted it?
• Does a subsequent engineering change require a new review?

This turns IMDS from a document-chasing exercise into a controlled part of the product lifecycle.

Regilient's automotive compliance workflow supports IMDS/CAMDS ingestion and validation, supplier data collection, GADSL rule checks and OEM-ready outputs, which is the operational layer needed when these processes have to work across many suppliers and parts. IMDS & ELV Compliance Software

IMDS and PPAP: the practical takeaway

IMDS supports the material-compliance evidence behind automotive part approval.

The biggest risk is not simply failing to submit an MDS. It is discovering too late that the underlying material data is incomplete, inaccurate, outdated or inconsistent with the part being approved.

The most effective approach is therefore to connect:

rather than managing each activity as a separate process.

For teams dealing with recurring supplier-data problems, the first place to look is usually the quality of the material information entering the workflow. Regilient's analysis of IMDS data-quality problems covers the most common causes of rejected or reworked MDS submissions. IMDS Data Quality Problems in Automotive Material Declarations