Top 10 Common Errors When Completing an Operation and Maintenance Manual (And How to Simplify the O&M Manual Process)

Why O&M Manuals Matter

An Operation and Maintenance manual is not just a project close-out requirement.

It:

• Supports regulatory compliance.
• Protects against liability.
• Provides maintenance procedures.
• Helps facilities teams manage assets.
• Reduces lifecycle costs.
• Supports digital handover.

In many construction projects, the O&M manual becomes the foundation for the building’s asset register and long-term facilities management strategy.

When done poorly, it creates years of inefficiency.

Leaving O&M Manuals Until the End of the Project

One of the biggest mistakes is treating O&M documentation as a last-minute task.

When information is gathered at project completion:

• Documentation is incomplete.
• Suppliers are difficult to contact.
• Manuals are missing.
• Data is inconsistent.

To simplify the O&M manual process, documentation should be captured throughout construction, not at the end.

Submitting Generic Manufacturer Literature

Uploading large bundles of manufacturer brochures without relevance to the installed equipment is a common error.

An effective O&M manual should include:

• Model-specific information.
• Installed product data.
• Commissioning details.
• Maintenance schedules.

Not 300-page catalogues.

Missing Maintenance Schedules

Poor Document Structure and Version Control

Disorganised file delivery is one of the most frequent rejection triggers.

Common problems include:

• Multiple duplicated documents.
• Poor file naming.
• No consistent folder structure.
• Superseded revision documents.
• Oversized, unstructured zip folders.

Clear version control and consistent structure significantly improve digital handover quality.

Technical and Quality Control Errors That Frequently Lead to Rejection

Beyond missing information, many O&M manuals are rejected due to avoidable technical errors. These are issues we repeatedly encounter across projects.

🔍 Drawing File Errors and Missing X-Refs

Where a .dwg file relies on external reference drawings (X-Refs), these must be properly bound in.

If linked files such as logos, images or referenced drawings are not included, the drawing becomes incomplete when opened externally.

Best practice is to use the AutoCAD eTransmit process (or equivalent) to create a complete zip file containing all referenced data.

Failure to do so is a common reason for rejection.

📐 Non-Issue of Original .DWG Files

If contractors are required to issue original AutoCAD .dwg files, these must be included in the electronic submission, not just PDF copies.

Additionally:

·       .dwg files must match the associated schedule.

·       Naming must align with the PDF version.

·       Drawing numbers must be consistent across formats.

Missing native files often results in section rejection.

🏷 Incorrect Naming of Record Drawings

A consistent naming system is essential.

We advise a format such as: Section Ref Drawing Number_Drawing Title

This allows:

·       Clear cross-referencing within the O&M.

·       Easier verification against schedules.

·       Efficient navigation for the end user.

Inconsistent naming slows review and frequently leads to rejection.

📁 Incorrect Naming of Files Within Scheduled Sections

Where schedules reference multiple external documents, file names must clearly correspond to the listed items.

Recommended formats include:

·       Section Ref Document Name

·       Section Ref Manufacturer_Literature Title

If file names do not align with the schedule, auditors cannot verify compliance efficiently.

📄 Failing to Convert Original Files to PDF

All record information issued in original formats — including:

·       Word (.doc)

·       Excel (.xls)

·       AutoCAD (.dwg)

Must also be provided as PDF copies with identical naming.

When converting:

·       File names must match exactly.

·       Orientation must match the original.

·       Files must be printable.

Failure to provide matching PDFs is a frequent cause of rejection.

📎 Joining Separate PDF Documents Together

Where a schedule lists multiple documents, each must be issued as an individual PDF.

Auditors will check that:

·       The number of PDFs matches the schedule.

·       Each listed document is individually accessible.

Scanning multiple documents into a single combined file, especially signed documents, will result in rejection.

🧾 Incorrect Text Tense in Scope of Works

O&M manuals are records of installed works and must be written in historical tense:

✔ “was installed”
✔ “has been commissioned”

Not:

✖ “shall be installed”
✖ “will be provided”

This mistake often occurs when design-stage documentation is copied into the O&M without revision.

🏗 As-Built and Record Drawings Not Properly Issued

All drawings must be issued in As-Built or Record status.

They must:

·       Reflect all changes during construction.

·       Include appropriate revision markings.

·       Be clearly stamped as Record or As-Built.

Issuing design-stage drawings instead of final record drawings is a serious compliance issue.

🔄 Incorrect PDF File Orientation

Converted PDF files must match the original orientation:

·       Portrait documents remain portrait.

·       Landscape drawings remain landscape.

Common issues include:

·       Upside-down scans.

·       Incorrect DWG-to-PDF output settings.

·       Cropped drawings.

These presentation errors often lead to avoidable rejection.

🔐 Locked Documents

Documents must not be password-protected or locked in a way that prevents printing.

This commonly occurs with:

·       Manufacturer literature.

·       Safety data sheets.

·       Third-party compliance documentation.

All documents should be unlocked and printable before submission.

Lack of Regulatory and Compliance Information

Certain systems require specific documentation for legal compliance, including:

• Fire safety systems
• Electrical installations
• Lifting equipment
• Pressure systems

Failure to include certificates and compliance documentation exposes building owners to regulatory risk.

Disorganised File Structures

Many O&M manuals are delivered as:

• Unstructured PDF folders
• Large zip files
• Poorly named documents
• Multiple duplicated files

This makes it difficult for project managers and facilities teams to find critical information quickly.

To simplify the O&M manual process, documentation must be structured logically and consistently.

No Digital Handover Strategy

Modern construction projects increasingly require digital handover.

A static PDF manual:

• Cannot integrate with CAFM systems.
• Cannot populate digital asset registers.
• Is difficult to update.

Digital O&M management improves efficiency and reduces long-term operational cost.

Failure to Define Responsibilities

An O&M manual should clearly outline:

• Maintenance procedures.
• Servicing responsibilities.
• Inspection frequencies.
• Access requirements.

Without clarity, essential maintenance may be overlooked.

Not Updating the Manual Post-Handover

O&M manuals should not be static documents.

When:

• Equipment is replaced
• Systems are upgraded
• Layouts are altered

The manual must be regularly updated.

Failure to maintain it undermines its value entirely.

How to Simplify the O&M Manual Process

To avoid these errors, construction teams should:

✔ Capture information during the build.

✔ Standardise documentation requirements.

✔ Use structured templates.

✔ Implement version control.

✔ Align with digital asset registers.

✔ Automate document collection from suppliers.

Most importantly, they should treat O&M documentation as part of project delivery, not an afterthought.

Why This Matters for Project Managers

For project managers, poor O&M documentation creates:

• Delayed practical completion
• Payment disputes
• Reputational damage
• Frustrated clients

A simplified, structured O&M manual process protects programme timelines and improves client satisfaction.

Frequently Asked Questions

What is an O&M manual?

An Operation and Maintenance manual contains information required to safely operate and maintain a building and its installed systems.

Is an O&M manual a legal requirement?

While not always directly legislated, O&M documentation supports compliance with various building regulations and contractual obligations.

What should an O&M manual include?

Maintenance schedules, asset registers, compliance certificates, commissioning information and manufacturer documentation relevant to installed systems.

How can you simplify the O&M manual process?

By digitising documentation, standardising requirements, collecting information throughout construction and integrating with asset management systems.

Simplifying the O&M Manual Process with Digital Systems

Many of the recurring errors in O&M submissions such as incorrect file naming, missing X-Refs, outdated revisions, locked documents and incomplete as-built records are not technical failures. They are process failures.

Digital information management significantly reduces these risks.

A structured, centralised system transforms O&M documentation from a rushed handover exercise into a controlled, ongoing process.

A robust digital platform ensures:

·       Secure, structured document storage.

·       Standardised naming conventions.

·       Controlled revision management.

·       Full document traceability.

·       Validation of required file formats.

·       Clear alignment between schedules and supporting documents.

·       Immediate access for facilities and maintenance teams.

Instead of static folders or binders issued at completion, digital systems create a structured, searchable building information library.

This improves:

·       Regulatory compliance.

·       Handover efficiency.

·       Audit approval rates.

·       Long-term asset management.

·       Accuracy when raising work orders.

By embedding quality controls into the submission process itself, many of the common O&M rejection issues can be prevented before they occur.

At Liaison Systems Ltd, we support organisations in managing operations and maintenance documentation through structured digital information management including our online building information library platform, View, designed to keep O&M documentation accurate, compliant and accessible throughout a building’s lifecycle. We also provide a structured gatekeeping and auditing service, giving clients confidence that their O&M documentation meets the quality standards required to safely operate and maintain their building.

Final Thoughts

An Operation and Maintenance manual should support the long-term success of a construction project, not create additional risk.

By identifying and eliminating common errors, organisations can simplify the O&M manual process, improve regulatory compliance, enhance digital handover and deliver real operational value beyond project completion.