Construction Phase Plans (CDM)

Construction Phase Plans (CDM 2015)

For projects that fall under the Construction (Design and Management) Regulations 2015, NexusRMS provides a dedicated Construction Phase Plan (CPP) model. This is separate from the standard event production phase plan and is designed to meet all UK CDM 2015 compliance requirements.

Plan Numbering & Statuses

Construction phase plans use a distinct numbering format: CPP-2025-0042. Each plan progresses through the following statuses:

1. Draft — initial creation, all fields editable
2. Submitted — plan submitted for review by duty holders
3. Approved — formally approved, records approver and approval date
4. Active — plan is in force for the duration of the project
5. Archived — project complete, plan retained for record-keeping

CDM 2015 Duty Holders

Every construction phase plan records the key CDM 2015 duty holders as required by regulation:

Duty Holder	Fields Captured
Client	Full client details from the project record
Principal Designer	Name and professional qualification
Principal Contractor	Name and professional qualification

Plan Data & Pre-Construction Information

The plan data is stored as comprehensive JSON covering all CDM 2015 requirements — including management arrangements, site rules, welfare facilities, and emergency procedures. A separate pre-construction information (PCI) JSON section captures the information that must be provided by the client before construction begins.

HSE Notification

For notifiable projects, the plan tracks whether the Health and Safety Executive has been notified. Three fields manage this process:

• hse_notified — boolean flag indicating notification status
• hse_notification_date — the date notification was submitted
• hse_reference — the HSE reference number received

The HSE notification links to the F10 notification managed by the CdmNotification model from the RAMS module.

Person-Day Tracking

CDM 2015 requires tracking of project scale. The plan records estimated_person_days (total person-days for the project) and estimated_max_workers (maximum number of workers on site at any one time). These figures determine whether the project meets the HSE notification threshold.

Approval Workflow

When a plan is submitted for approval, an authorised user reviews the content and either approves or returns it for amendment. Upon approval, the system records the approved_by_id (the approving user) and approved_at (the approval timestamp). Approved plans are locked from further editing unless an admin user overrides the lock.

Revision System

Construction phase plans maintain a revision_number and revision_date. Each significant update to an approved plan increments the revision number and records the date, creating a clear audit trail of changes throughout the project lifecycle.

PDF Generation & RAMS Integration

Construction phase plans use a separate PDF template tailored to CDM compliance requirements. The generated document includes all duty holder information, HSE notification details, and pre-construction information in the format expected by regulators.

CDM plans can reference RAMS documents and share entries from the common hazard library. This integration ensures consistency between risk assessments and the construction phase plan.

Compliance Percentage

A computed accessor calculates the overall compliance percentage based on how many required sections and fields have been completed. This provides a quick visual indicator of plan readiness before submission.

RAMS & CDM Addon

F10 notifications, the principal contractor register, and detailed CDM compliance features are part of the RAMS & CDM addon (+£99/mo). The construction phase plan feature works alongside these tools to provide comprehensive CDM 2015 compliance. Refer to the RAMS & CDM Knowledge Base articles for further details.