Complete

Purpose

Test, commission, start and stabilise the plant, formally hand it back to Operations and close event work and records.

Scope

Commissioning readiness verification and de-isolation
Functional and performance testing
Start-up, ramp-up and stabilisation
Operational handover and acceptance
Work-order closure and equipment history capture
Demobilisation, site restoration and event completion authorisation

Phase Gate

Every phase closes at a formal phase gate. Work may proceed to the next phase only when the accountable authority accepts the required outputs, the outstanding conditions and the residual risks. The gate is a decision, not a formality — an unaccepted gate means the event is not ready to move on.

Process Steps

01
Verify Commissioning Readiness
Intent
Confirm that each system is safe, complete and correctly configured before energy or process material is introduced.
Inputs
- Mechanical Completion Certificates
- System turnover packages
- Punch list
- Isolation and de-isolation plan
- Commissioning procedures
- Test equipment and competent personnel
- Start-up risk assessments
Actions
- Review system completion boundaries
- Verify mandatory punch items are closed
- Confirm test procedures and acceptance criteria
- Confirm authorised commissioning personnel
- Verify instrument, control and protection readiness
- Verify lubrication, alignment, rotation and process prerequisites
- Confirm utilities and supporting systems
- Confirm emergency and abnormal-response arrangements
- Authorise transition to commissioning status
- Communicate system status and restrictions
People
Commissioning Manager is responsible. Operations accepts operating controls. Maintenance, Engineering, Electrical, Instrumentation, HSE and Quality verify prerequisites.
Process
No system is energised until commissioning readiness is formally accepted.
Technology
Completion management system, DCS, SCADA, commissioning database and permit/isolation system.
What Good Looks Like
- Commissioning begins with known system status
- Test criteria are defined before testing
- Mandatory punch items are closed
- Operations understands temporary restrictions
What Bad Looks Like
- Energisation is used to discover incomplete work
- Test procedures are developed in the field
- Protection systems are bypassed without control
- Mechanical and commissioning boundaries are unclear
Outputs
- Commissioning Readiness Certificate
- Approved system status
- Commissioning permit or authority
- Accepted residual punch list
- Test sequence authorisation
02
De-Isolate and Energise Systems
Intent
Restore energy and process capability in a controlled sequence while protecting people, equipment and system integrity.
Inputs
- Approved de-isolation plan
- Commissioning Readiness Certificate
- Isolation register
- System test sequence
- Permit status
- Communication plan
Actions
- Confirm affected work is complete or suspended safely
- Close or transfer applicable permits
- Verify system boundaries and personnel clearance
- Remove isolations in the approved sequence
- Record each isolation removal
- Apply temporary commissioning isolations where approved
- Introduce energy progressively
- Monitor for leakage, abnormal condition or unintended movement
- Stop and make safe if acceptance conditions are not met
- Confirm energised system status
People
Operations controls de-isolation. Authorised isolators perform removal. Commissioning, Maintenance, HSE and affected Supervisors verify readiness.
Process
De-isolation is treated as planned critical work. Isolations are never removed solely because a schedule milestone has been reached.
Technology
Isolation management system, permit system, DCS, SCADA and field communication systems.
What Good Looks Like
- Energy is restored in a known sequence
- Personnel clearance is positively verified
- System response is monitored at each stage
- Isolation records match physical condition
What Bad Looks Like
- Multiple systems are energised without coordinated control
- Permits remain open after isolation removal
- Temporary isolations are undocumented
- Abnormal conditions are accepted to protect schedule
Outputs
- Updated isolation register
- Energised-system confirmation
- De-isolation record
- Abnormal-condition report
- Authorised next test stage
03
Conduct Functional and Performance Testing
Intent
Demonstrate that repaired, replaced and modified equipment performs its required function within approved acceptance criteria.
Inputs
- Energised system
- Approved test procedures
- Technical acceptance criteria
- Calibrated test equipment
- Baseline performance information
- Work-pack and modification records
Actions
- Conduct static and no-load tests
- Verify direction, sequence and interlocks
- Test alarms, trips and protective functions
- Conduct load and process tests
- Record vibration, temperature, pressure, flow and other required values
- Compare results with acceptance criteria
- Investigate and rectify failed results
- Repeat tests after corrective work
- Obtain technical and operational acceptance
- Store completed test records
People
Commissioning team performs tests. Operations operates the equipment. Maintenance, Engineering, Reliability and vendors support diagnosis and acceptance.
Process
A successful start is not sufficient evidence of performance. Required functions and protections must be tested and recorded.
Technology
DCS, SCADA, condition-monitoring equipment, calibrated test instruments, commissioning database and CMMS.
What Good Looks Like
- Results are measured against predefined criteria
- Protective functions are tested
- Failed tests trigger controlled corrective action
- Baseline data are captured for future comparison
What Bad Looks Like
- Equipment is accepted because it runs
- Test values are not recorded
- Failed alarms or trips are deferred informally
- Temporary bypasses remain after testing
Outputs
- Completed Commissioning Test Records
- Performance acceptance results
- Corrective-work records
- Initial operating baseline
- Technical acceptance certificate
04
Start Up and Ramp Up the Plant
Intent
Return the plant to stable production through a controlled sequence that protects equipment, process quality, people and the environment.
Inputs
- Accepted commissioning results
- Approved start-up procedure
- Production plan
- Operating limits and alarm settings
- Start-up risk assessment
- Support resource plan
Actions
- Confirm authorisation to commence start-up
- Start systems in the approved sequence
- Establish utilities and process flows
- Increase load through defined stages
- Monitor asset and process parameters
- Verify product quality and environmental controls
- Maintain specialist support at critical stages
- Stop, hold or reduce load when limits are exceeded
- Record start-up defects and interventions
- Confirm stable operation at required performance
People
Operations owns start-up. Commissioning coordinates technical support. Maintenance, Reliability, Engineering, HSE, Process Control and vendors support monitoring and response.
Process
Ramp-up stages and hold points are controlled. Production pressure does not override defined equipment or process limits.
Technology
DCS, SCADA, historian, condition-monitoring platform, laboratory systems and event dashboard.
What Good Looks Like
- Load increases through controlled stages
- Abnormal trends are addressed early
- Product and environmental requirements are maintained
- Maintenance support remains until stability is proven
What Bad Looks Like
- Plant is taken directly to full load
- Alarms are accepted as normal after shutdown
- Start-up defects are lost in verbal communication
- Support teams demobilise before stability
Outputs
- Start-Up Record
- Ramp-up performance report
- Start-up defect register
- Stable-operation confirmation
- Production performance status
05
Complete Operational Handover
Intent
Formally transfer responsibility for stable plant operation from the event organisation to normal Operations.
Inputs
- Stable-operation confirmation
- Commissioning and test records
- Open punch and defect lists
- Temporary change and bypass register
- Updated operating information
- Asset condition restrictions
Actions
- Confirm required performance has been achieved
- Review outstanding defects and restrictions
- Review temporary repairs, bypasses and controls
- Confirm monitoring and follow-up requirements
- Transfer updated procedures and technical information
- Assign owners and dates for outstanding work
- Confirm spares, specialist support and response arrangements
- Obtain Operations acceptance
- Record the date, time and conditions of handover
- Communicate handover to stakeholders
People
Operations Manager accepts handover. Shutdown Manager transfers event responsibility. Maintenance, Reliability, Engineering, HSE and Commissioning endorse applicable conditions.
Process
Handover can occur with approved outstanding items only when risk, ownership, due date and operating restrictions are documented.
Technology
Electronic handover workflow, CMMS, operations log, defect register and document control.
What Good Looks Like
- Operations knows the exact plant configuration
- Outstanding items have owners and controls
- Temporary conditions are highly visible
- Handover acceptance is formally recorded
What Bad Looks Like
- Handover is assumed when production resumes
- Temporary bypasses are not disclosed
- Punch items have no accountable owner
- Operations receives incomplete technical records
Outputs
- Operational Handover Certificate
- Accepted outstanding-work register
- Temporary-control register
- Monitoring and follow-up plan
- Formal end of event operation
06
Close Work Orders and Capture Equipment History
Intent
Create accurate maintenance and equipment records describing what was done, what was found and the condition in which each asset was left.
Inputs
- Completed Work Packs
- Labour and material actuals
- Inspection and measurement records
- Failure and condition findings
- Commissioning results
- Follow-up work requirements
Actions
- Verify task completion and job status
- Record work performed
- Record equipment condition and failure evidence
- Record failure mode, mechanism and cause codes where known
- Record labour, materials, services and tools used
- Attach photographs, test sheets and technical reports
- Identify incomplete or follow-up work
- Raise new controlled work requests
- Update asset, BOM, drawing and strategy information where required
- Obtain supervisory review
- Change the work order to the correct completion status
People
Tradespeople record execution information. Supervisor verifies quality. Planner or CMMS Controller completes system closure. Reliability and Engineering review significant findings.
Process
A work order is not closed until the record provides useful maintenance history and all additional work has been captured.
Technology
CMMS, mobile work management, document repository, asset register and reliability database.
What Good Looks Like
- History explains what was done, found and left
- Failure evidence and measurements are retained
- Follow-up work is traceable
- Master data are updated when configuration changes
What Bad Looks Like
- History states only “job complete”
- Labour and material actuals are missing
- Follow-up defects remain in notebooks
- Work orders are batch closed without supervisory review
Outputs
- Closed Work Orders
- Complete equipment history
- Follow-up work requests
- Updated asset and master data
- Closure quality report
07
Demobilise and Restore the Site
Intent
Remove temporary event infrastructure, return hired and unused resources, and leave all work areas safe, clean and suitable for normal operations.
Inputs
- Operational Handover
- Logistics Plan
- Hire and contractor registers
- Material and waste records
- Temporary installation register
- Site restoration requirements
Actions
- Remove temporary facilities, barriers and services
- Dismantle scaffold and temporary access
- Return hired tools, vehicles and equipment
- Return, preserve or dispose of unused materials
- Segregate repairable, scrap and warranty items
- Remove waste using approved disposal pathways
- Inspect laydown and work areas
- Restore roads, drainage, guards and permanent access
- Confirm contractor demobilisation
- Close temporary access and security permissions
- Record outstanding restoration work
People
Logistics Coordinator manages demobilisation. Warehouse, HSE, Environment, Security, Contractors, Maintenance and Operations verify restoration.
Process
Demobilisation is planned and scheduled. Personnel do not leave site before assigned materials, records and areas are formally returned.
Technology
Hire register, inventory system, waste tracking, access-control system and site inspection application.
What Good Looks Like
- Site condition is equal to or better than pre-event condition
- Hired assets are returned promptly
- Repairable and warranty items are controlled
- Temporary services are fully removed
What Bad Looks Like
- Waste and unused material remain in laydown areas
- Hire charges continue after the event
- Temporary cables or barriers become permanent
- Contractors leave before close-out obligations are complete
Outputs
- Site Restoration Certificate
- Demobilisation record
- Returned-hire register
- Material disposition record
- Outstanding restoration list
08
Authorise Event Completion
Intent
Confirm that all requirements for ending the shutdown event have been satisfied and transfer remaining obligations into controlled close-out processes.
Inputs
- Operational Handover Certificate
- Work-order closure status
- Site Restoration Certificate
- Outstanding-work register
- Preliminary cost and schedule performance
- Incident and compliance status
- Records completeness status
Actions
- Confirm plant handover and stable operation
- Confirm work fronts and temporary facilities are closed
- Confirm outstanding work has owners and controls
- Confirm permits and isolations are closed or formally transferred
- Confirm statutory and quality records are secured
- Confirm financial commitments are captured
- Confirm event records are under document control
- Confirm improvement and final-report activities are scheduled
- Obtain Event Sponsor completion approval
- Close the active event-control structure
People
Shutdown Manager recommends completion. Event Sponsor approves it. Operations, Maintenance, HSE, Finance, Commercial, Planning and Document Control provide closure evidence.
Process
Event completion does not mean every administrative action is finished. It means remaining actions are known, owned and transferred into controlled close-out.
Technology
Event management system, CMMS, completion workflow, finance platform and document repository.
What Good Looks Like
- Active event risks are closed or transferred
- Remaining obligations have accountable owners
- Records and costs are secured before team dispersal
- Formal completion time is documented
What Bad Looks Like
- The event is considered complete when production restarts
- Financial and work records remain unresolved
- Contractors disperse with outstanding deliverables
- Improvement activities have no scheduled owner
Outputs
- Event Completion Certificate
- Transferred-action register
- Final close-out plan
- Confirmed completion date and time
- Phase 05 Gate Approval

Key Performance Indicators

KPI	Why It Matters	How To Measure	World Class	Benchmark	Typical
Start-up on or before plan	The production date is the number the business remembers — everything else is internal.	Actual first-product / return-to-service time versus the baselined time.	—	100% of events	—
Start-up defects and rework in first 72 hours	Start-up defects mean testing and completion were compressed to protect the date.	Count defect notifications raised within 72 hours of return to service.	—	<3 per event	—
Work orders closed with usable equipment history	Uncaptured findings mean the next event starts blind and reliability analysis has nothing to work with.	Closed work orders with cause, damage and findings populated ÷ event work orders.	>98%	>95% within 2 weeks	50–70%
Ramp-up to full rate	A slow ramp is real lost production that rarely gets counted against the event.	Compare actual rate against the agreed ramp-up curve day by day.	—	Within the planned curve	—