How do I set up a document control system for baselining and versioned artifacts in an aerospace engineering team?

Here’s a practical way to set up a document control system for baselining and versioned artifacts in an aerospace engineering team. The goal is to make sure every requirement, drawing, model, analysis, and procedure can be traced, reviewed, approved, baselined, and changed in a controlled way.

1) Define what must be controlled

Start by classifying the artifact types that need document control. In aerospace, this usually includes:

• Requirements documents
• System/subsystem/interface specifications
• Drawings and CAD models
• Analysis reports and spreadsheets
• Test plans, procedures, and reports
• Software and firmware configuration items
• Manufacturing instructions and work packages
• Compliance matrices
• Risk registers and safety artifacts

Decide which of these are:

• Configuration items (CIs): controlled under formal change management
• Reference documents: read-only or limited control
• Working documents: draft/internal only

2) Establish document lifecycle states

Use a simple, enforced lifecycle such as:

1. Draft
2. In review
3. Approved
4. Baselined
5. Released
6. Superseded / Obsolete

A useful rule:

• Anything used for design, build, test, or certification should be either approved or baselined/released
• Drafts must not be used as authoritative input

3) Define baseline levels

Aerospace teams usually need multiple baseline types, for example:

• Functional baseline: what the system must do
• Allocated baseline: how requirements are distributed to subsystems
• Product baseline: the final approved definition of the product
• Build/test baseline: exact artifact set used for a specific build or test campaign

For each baseline, define:

• What artifacts are included
• Who approves it
• How it is identified
• How changes after baseline are handled

4) Set naming and numbering conventions

Create a standard format for document IDs and versions.

Example:

• SYS-REQ-001
• SUB-ICD-014
• ENG-ANL-022
• TEST-PRO-105

Versioning example:

• Draft versions: v0.1, v0.2
• Approved revisions: Rev A, Rev B
• Major/minor model: if needed, 1.0, 1.1

Common aerospace practice:

• Use revision letters for released artifacts
• Use version numbers only for working drafts
• Once released, revisions should be immutable

5) Implement a controlled repository

Use a system that supports:

• Access control
• Check-in/check-out or controlled editing
• Revision history
• Approval workflows
• Audit trails
• Baseline snapshots

Examples of systems often used:

• PLM/PDM tools for engineering artifacts
• Document management systems with workflow support
• Git for software and some text-based engineering content
• A combination of PLM + Git + document repository

Important:

• Don’t rely on shared drives or email attachments for controlled artifacts
• Use a single source of truth

6) Create a document control procedure

Write a formal procedure that covers:

Creation

• Who can create documents
• Required template and metadata
• Required reviews before release

Review and approval

• Technical review
• Quality/configuration management review
• Safety or certification review if applicable
• Formal approver roles

Release

• How an artifact becomes official
• How release is recorded
• How a baseline is established

Change control

• How change requests are submitted
• Impact assessment requirements
• Approval authority by change class
• How affected artifacts are updated

Supersession

• How older revisions are archived
• How users are warned about obsolete versions

7) Define roles and responsibilities

At minimum, assign:

• Document Owner: accountable for content
• Author: drafts and updates
• Reviewer(s): technical check
• Approver: authorizes release
• Configuration Manager / Document Control Specialist: manages IDs, baselines, status, archive
• Quality/Compliance: ensures process adherence

A clear rule helps:

• Engineers can author
• Only designated approvers can release
• Only configuration management can baseline or supersede official records

8) Use templates and mandatory metadata

Every controlled artifact should include metadata such as:

• Document ID
• Title
• Revision
• Status
• Owner
• Approver(s)
• Effective date
• Applicable program/project
• Security/classification level
• Related requirements/change request IDs

Templates reduce variability and help audits.

9) Baseline by snapshot, not by folder

A baseline should be a frozen snapshot of exact revisions, not just a folder name.

A baseline record should include:

• Baseline ID
• Date/time
• Purpose
• List of artifact IDs and exact revisions
• Approval record
• Reason for baseline
• Change log since prior baseline

Example:

• BL-PRJ-001 Functional Baseline
• Includes:
  • SYS-REQ-001 Rev B
  • SYS-ICD-004 Rev A
  • SAF-ANL-002 Rev C

10) Set up change management

After baselining, any modification should go through formal change control.

Typical flow:

1. Submit change request or engineering change proposal
2. Perform impact analysis
3. Determine affected artifacts and downstream impacts
4. Approve or reject change
5. Update artifacts
6. Re-review and re-release
7. Update baseline if required

For aerospace, define change classes:

• Minor editorial change
• Technical change
• Safety-critical / certification-impacting change
• Production impact change

Different classes should require different approval levels.

11) Ensure traceability

Your system should support traceability from:

• Requirement → design → analysis → test → verification evidence
• Change request → impacted documents → approved revision → baseline

This is especially important for certification and audit readiness.

12) Build access control and auditability

Set permissions by role:

• Authors can edit drafts
• Reviewers can comment but not release
• Approvers can approve
• Document control can baseline and archive
• General users can view released artifacts only

Ensure the system logs:

• Who changed what
• When
• Why
• Approval history
• Baseline history

13) Handle software and hardware artifacts differently

Aerospace programs often need different control strategies:

Software/firmware

• Version control system with branching/tagging
• Release tags mapped to baselines
• Build reproducibility
• Change traceability to requirements and tests

Hardware/documents/models

• PLM/PDM or controlled document system
• Revision control, approval workflow, baseline snapshots
• Frozen released files and models

14) Create a baseline calendar and release cadence

To avoid chaos:

• Define planned baseline points: SRR, PDR, CDR, TRR, first article, qualification test, production release
• Keep ad hoc baselines rare and justified
• Require baseline reviews before major milestones

15) Train the team and enforce compliance

A good system fails if people bypass it. Train everyone on:

• Draft vs released status
• Where to find the authoritative version
• How to request changes
• What counts as controlled data
• Why email attachments and local copies are not allowed

Then enforce it with:

• Periodic audits
• Repository permissions
• Tooling that prevents uncontrolled release

A simple operating model

If you want a lightweight starting point, use this:

• Drafts live in a working space
• Released artifacts live in a controlled repository
• Every released artifact has an ID, revision, owner, approver, and effective date
• Baselines are created as tagged snapshots of released revisions
• Changes after baseline require an ECR/ECO process
• Only controlled repository links are accepted in reviews, builds, and tests

Suggested minimum policy set

1. Document control procedure
2. Configuration management plan
3. Change control procedure
4. Naming/versioning standard
5. Template set
6. Baseline approval procedure
7. Access control policy
8. Archive/retention policy

Common pitfalls to avoid

• Using shared folders as the official system
• Allowing multiple “final” versions
• Not distinguishing draft from released
• No formal baseline snapshot
• Missing traceability between requirements and verification
• Letting teams make direct edits to released artifacts
• Unclear approval authority

If you want a very small implementation roadmap

Phase 1

• Define artifact types and controlled statuses
• Set naming/version rules
• Choose repository/tooling

Phase 2

• Implement review/approval workflow
• Add baseline snapshots
• Add change request process

Phase 3

• Add traceability, audit reporting, and compliance dashboards
• Integrate with requirements, test, PLM, and software tools

If you’d like, I can also give you:

1. a sample document control procedure,
2. a baseline/change control workflow diagram, or
3. a tool architecture recommendation for a mixed hardware/software aerospace team.