A petrochemical plant in Texas ran its turnaround 11 days over schedule in 2023 — not because of a major equipment failure or a safety incident, but because the contractor coordination plan lived in three separate spreadsheets, nobody owned the critical path review after day 4, and 23 replacement parts arrived to the wrong staging area on the same morning. The cost of those 11 days: $4.7 million in deferred production and $880,000 in contractor overtime. Turnaround failures are rarely caused by bad engineering. They are caused by bad information management. The plants that compress shutdown duration and contain costs are the ones that treat turnaround execution as a data problem, not just a scheduling problem. If your team is managing a turnaround with paper or disconnected tools, book a demo of Oxmaint and see how a connected CMMS changes the outcome.
Plant Reliability — Turnaround Management
What Separates On-Budget, On-Schedule Turnarounds from the Rest
Most turnarounds go over time and over budget. The gap between best-in-class and average is almost entirely process and data discipline — not engineering complexity.
65%
Of turnarounds exceed their original budget
$1M+
Cost per day of unplanned overrun in large plants
30%
Average duration savings with structured CMMS execution
18 wks
Minimum recommended planning lead time for major TAR
The Turnaround Lifecycle — 6 Phases That Determine Outcome
Phase 1
Scope Definition
18–24 weeks out
Define every work order that will be executed during the shutdown. Classify by criticality: statutory, corrective, preventive, and opportunity work. Scope creep during execution is the single biggest driver of overruns — locking scope early is not bureaucracy, it is cost control.
Key output: Approved scope register with priority classification
Phase 2
Planning & Estimation
12–18 weeks out
Develop work packages for each job: material lists, labour estimates, equipment requirements, isolation procedures, and permit types. Each work package should be executable by a contractor team without verbal instruction — if you have to explain it, the package is incomplete.
Key output: Complete work packages with BOMs and isolation lists
Phase 3
Procurement & Logistics
8–12 weeks out
Order all critical spares, scaffolding, craneage, and consumables. Long-lead items (heat exchanger bundles, control valves, specialty gaskets) require lead times of 6–16 weeks. Materials that arrive late or at the wrong staging area are a leading predictor of overrun — the Texas example above is not unusual.
Key output: Materials committed with delivery confirmation and staging plan
Phase 4
Contractor Mobilization
2–4 weeks out
Induct all contractors, brief on site safety rules and permit procedures, assign work areas, and confirm each crew's work package assignments. Poor contractor management — overlapping trades, permit queues, access conflicts — accounts for 40% of schedule overruns in complex turnarounds.
Key output: Contractor induction records, work area assignments, permit matrix
Phase 5
Execution
Shutdown duration
Daily progress tracking against the critical path. Work order completion rates, punch list management, additional scope authorization, and daily coordinator meetings are the operating rhythm. Every day with a critical path deviation needs a recovery plan before the end of shift — not at the next day's meeting.
Key output: Daily progress reports, real-time WO completion rates, deviation logs
Phase 6
Commissioning & Close-Out
Final 20–30% of duration
Punch list clearance, system reinstatement, pre-commissioning checks, and startup readiness reviews. Close-out documentation — every work order signed off, every permit cancelled, every isolation removed — is the legal and operational record that protects the plant and the contractor.
Key output: Cleared punch list, reinstatement certificates, close-out report
CMMS for Turnaround Execution
Manage Every Work Order, Every Contractor, Every Spare Part in One System
Oxmaint gives your turnaround team a connected platform for scope management, work package tracking, materials, contractor coordination, and close-out documentation — replacing the three spreadsheets that caused the $4.7M overrun.
The Cost of a Poor Turnaround — A Real Numbers Breakdown
Overrun Cost Drivers
Scope creep (unauthorized additions)
72% of overrun cases
Late materials / wrong staging
58% of overrun cases
Contractor access conflicts
44% of overrun cases
Permit delays and queue
39% of overrun cases
Undiscovered defects / additional scope
33% of overrun cases
$180K
Average cost of one extra day on a mid-size refinery TAR
4.2 days
Average overrun for turnarounds without dedicated CMMS tracking
$756K
Average preventable overrun cost per turnaround event
Turnaround Management Checklist — 30 Critical Actions
Months 4–6 Before Shutdown
Appoint turnaround manager and core planning team
Issue scope nomination to all department owners
Classify all nominated work: statutory, corrective, PdM, opportunity
Estimate duration, labour, and materials at work-order level
Freeze scope and formally approve the scope register
Months 2–4 Before Shutdown
Develop work packages with isolation, permit type, and BOM
Identify and order all long-lead materials
Contract specialist trades and confirm headcount
Prepare critical path schedule in CMMS
Establish scope change control procedure
Month Before Shutdown
Confirm all materials received and staged correctly
Issue work packages to contractors
Conduct contractor safety inductions
Walk-down of all work areas with each contractor lead
Confirm plant depressurization and isolation sequence
During Execution
Daily morning critical path review — no exceptions
Track work order completion rate vs plan in real time
All scope additions require formal written authorization
Punch list opened on day 1 and updated daily
Issue recovery plan same day for any critical path deviation
Frequently Asked Questions
What is the difference between a shutdown and a turnaround?
A shutdown stops production for maintenance, safety checks, or regulatory inspection. A turnaround is a planned shutdown that includes a defined scope of maintenance, inspection, and upgrade work before restart — typically more complex, longer, and involving contractors. Oxmaint manages both with dedicated work order workflows.
How far in advance should turnaround planning start?
Best-practice planning lead time is 18–24 weeks for major turnarounds and 10–14 weeks for minor ones. The most common mistake is starting materials procurement and contractor booking too late — particularly for long-lead spares with 8–16 week delivery windows.
How does a CMMS reduce turnaround duration and cost?
A CMMS like Oxmaint provides real-time work order completion tracking, materials readiness visibility, scope change authorization records, and close-out documentation in one system. Plants using structured CMMS execution report 20–30% shorter turnaround durations compared to spreadsheet-managed events.
What is scope creep and why is it the biggest turnaround risk?
Scope creep is the addition of unplanned work during execution — often well-intentioned but not authorized, not resourced, and not on the critical path. It is cited in 72% of turnaround overruns. A formal change control process, enforced through your CMMS, is the only reliable countermeasure.
What close-out documentation is required after a turnaround?
At minimum: signed work order completion records, inspection certificates, isolation removal confirmation, punch list clearance sign-off, and a post-turnaround cost and duration analysis. In regulated industries, statutory inspection sign-off and regulator notification may also be required.
CMMS for Turnaround Excellence
Your Next Turnaround Doesn't Have to Go Over Schedule
Oxmaint gives turnaround planners a single system for scope management, work packages, materials tracking, contractor coordination, daily progress dashboards, and close-out documentation — so every overrun driver is visible before it becomes a cost problem.
20–30%
Shorter turnaround durations with CMMS
1-click
Close-out documentation export
Zero
Unauthorized scope additions
Real-time
Critical path visibility
