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Plant Shutdown and Turnaround Planning: Complete Guide and Checklist Short Summary Effective plant shutdown and turnaround planning starts well before the outage, with clear goals, a controlled scope, detailed work packs and early procurement. Most cost and schedule overruns can be traced back to issues such as scope creep, late materials, incomplete work packs and poor restart planning. A successful turnaround also depends on clear responsibilities across the asset owner, EPC contractors and onsite engineering and trade teams. By using readiness reviews, critical KPIs, FAT and SAT, and a structured post-shutdown review, teams can reduce execution and start-up risks while improving future outages.
Plant shutdown and turnaround planning is the structured process of preparing a facility for a planned outage, completing critical maintenance or upgrade work, and returning the plant to safe operation. For a major turnaround, planning commonly begins 12 to 24 months before the shutdown, although the lead time varies with plant complexity, scope and long-lead procurement. Why so much preparation? Because most turnaround delays are created before the plant ever stops. A late material, a poor work pack or an uncontrolled scope change can become a critical-path problem once the outage begins. Quick answer: Plant shutdown and turnaround planning is the process of preparing for a planned plant outage. It covers scope, cost, schedule, materials, contractors, safety and start-up, followed by a review after restart. Many large turnarounds need 12 to 24 months of planning.
In this guide Why Turnarounds Overrun Budget and Schedule Turnaround Planning Timeline Planning Phases Explained How Do You Decide What Goes in the Turnaround Scope? Roles: Owner, EPC, and Onsite Trades What Is the Difference Between FAT and SAT in a Plant Turnaround? A Pre-Shutdown Checklist Which Turnaround KPIs Should You Track? Post-Shutdown Review When Should You Use an Owner’s Engineer for a Turnaround? Frequently Asked Questions Plan Your Next Turnaround
Sarom Global | Plant Shutdown and Turnaround Planning
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Why Turnarounds Overrun Budget and Schedule Most overruns come from weak planning, not bad luck on the day. These are the six most common causes.
1. Scope creep. The work list keeps growing after it should be locked. 2. Unplanned discovery work. Crews open equipment and find corrosion, cracks or worn parts, with no time or budget set aside.
3. Late materials. Long-lead valves, exchanger bundles or alloy pipe arrive after they are needed. 4. Poor work-pack quality. Jobs reach the field without confirmed materials, access, permits or tools.
5. Unclear decision rights. The owner, contractors and trades are not sure who approves what. 6. Weak start-up planning. Teams focus on taking the plant apart and forget the restart. From the field: Scope changes A scope change rarely affects one job alone. Adding a valve replacement may also need scaffolding, new isolations, lifting equipment, extra permits and a revised commissioning sequence. Check the change across every affected workstream before you approve it.
Turnaround Planning Timeline Here is a typical plant shutdown and turnaround planning timeline for a large outage. Note that planning and procurement run in parallel. Timing
Primary focus
18 to 24 months out
Strategy and business case
12 to 18 months out
Scope development
9 to 12 months out
Scope freeze
6 to 12 months out
Detailed planning and work packs
6 to 12 months out
Procurement and contractor engagement
1 to 3 months out
Readiness reviews
Outage
Execution, commissioning and start-up
1 to 3 months after
Review and lessons learned
Planning Phases Explained A good turnaround programme follows a clear sequence. Each phase has its own goal and its own sign-off.
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1. Strategy and Business Case Decide why the turnaround is needed: inspection, reliability work, a capacity upgrade, or all three. Set targets for safety, cost, duration and performance after restart. Name a turnaround manager and a core team. Decision rule: If the team cannot state the purpose of the outage in one or two sentences, the strategy is not ready.
2. Scope Development Collect work requests from operations, maintenance, inspection and projects. Challenge each one using inspection data, failure history and risk-based inspection results. Decision rule: If a job can be done safely while the plant is running, challenge it before adding it to the outage.
3. Scope Freeze Lock the scope on an agreed date. After that, every new job goes through a formal change process. Decision rule: After scope freeze, every addition must show its impact on cost, duration, safety and the critical path before approval.
4. Detailed Planning and Scheduling Break every job into work packs listing steps, crew, hours, tools, permits, isolations and materials. Build the schedule, find the critical path and add a discovery allowance based on past outages. From the field: Work-pack readiness Engineering completion does not mean a job is ready to execute. The crew still needs the right materials, access, isolations, tools, permits and work instructions. Treat a work pack as ready only when all of these are confirmed.
5. Procurement and Contractor Engagement Order long-lead materials against required-on-site dates, not just order dates. Test critical equipment before it ships with a Factory Acceptance Test (FAT). A fault found at the maker’s workshop costs far less than one found mid-outage. Book contractors, cranes, scaffolding and specialist trades early.
6. Pre-Shutdown Readiness Hold formal readiness reviews. Confirm that permits, isolations, safety plans, materials and people are in place. Walk the plant with the crews who will do the work.
7. Execution, Start-Up and Handover Hold daily progress meetings and track work against the critical path. Before restart, run a Site Acceptance Test (SAT) on new or modified systems to confirm they work in their real setting. From the field: Restart Start-up delays often trace back to small open items, such as an uncalibrated instrument, an open punch item or a valve that was never stroke-tested. Review the restart sequence before the shutdown begins, not in the final shift.
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How Do You Decide What Goes in the Turnaround Scope? Not every maintenance request belongs in the outage. A job belongs in scope when it:
• needs the equipment isolated or the plant stopped • creates a serious safety, integrity or production risk if deferred • can be done much more efficiently during the outage Use a simple priority matrix to rank the rest. Priority
Typical work
Decision
Critical
Safety-critical, statutory or production-critical
Must be in scope
High
Significant reliability or integrity risk
Include unless a safe alternative exists
Medium
Efficiency or reliability improvement
Include only if resources allow
Low
Can be safely deferred
Move to routine maintenance
This matrix is a planning aid, not a substitute for engineering judgement, safety requirements or legal obligations. In Australia, AS/NZS 3788 provides guidance for the in-service inspection of pressure equipment. Sites may also use risk-based inspection methods such as API RP 580, depending on their equipment, risk profile and applicable requirements.
Roles: Owner, EPC, and Onsite Trades Clear roles are one of the simplest ways to protect a turnaround. The asset owner is responsible for the turnaround as a whole. The owner sets goals, approves scope and budget, and makes the final call on risk. A single turnaround manager on the owner’s side should chair readiness reviews and control changes. The EPC contractor (engineering, procurement and construction) is often used when the outage includes new equipment, upgrades or tie-ins. The EPC team should join during scope development, not in the final weeks. Onsite engineers and trades do the physical work. When fitters, welders, electricians and instrument technicians review work packs early, they spot access problems and missing tools that planners may miss. Sarom Global’s Onsite Engineering and Trades team supplies engineers, technologists and tradespeople for shutdowns and turnarounds.
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What Is the Difference Between FAT and SAT in a Plant Turnaround? A FAT checks equipment before it leaves the supplier. A SAT checks that the installed equipment works correctly at the plant. FAT
SAT
Full name
Factory Acceptance Test
Site Acceptance Test
When
Before equipment leaves the supplier
After installation on site
What it checks
Build quality and compliance with the specification
Installation and operation on site
Setting
Controlled factory environment
Real operating environment
Both reduce the risk of start-up delays, so plan both into the turnaround schedule.
A Pre-Shutdown Checklist Use this checklist in the months before your outage. Scope and schedule ☐ Turnaround goals for safety, cost, duration and performance approved ☐ Scope freeze date approved and met ☐ All post-freeze changes documented with cost, schedule and risk impact ☐ Critical path reviewed by planning, operations and trades ☐ Discovery allowance included in time and budget Materials and equipment ☐ Long-lead materials ordered against required-on-site dates ☐ FAT complete for critical valves, skids and control systems ☐ Materials physically on site, checked and staged near the work ☐ Crane, scaffold and access plans confirmed People and work packs ☐ Critical work packs reviewed by the crews who will do the work ☐ Decision rights between owner, EPC and trades written down ☐ Contractors inducted and briefed ☐ Shift rosters and fatigue plans in place Safety and control ☐ Isolation boundaries verified in the field ☐ Permit-to-work plan and high-risk job assessments complete ☐ Alarm and control system changes documented and reviewed Commissioning and restart ☐ Mechanical completion criteria defined ☐ Commissioning sequence agreed
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☐ Punch-list ownership assigned ☐ Critical punch items closed before start-up ☐ SAT plans ready for new or modified systems ☐ Restart sequence reviewed before shutdown begins ☐ Baseline plant performance data recorded
A Practical 5-Point Turnaround Readiness Test Before you commit to a shutdown date, ask five questions. If any answer is “no”, the outage is at risk.
1. Is the scope frozen? 2. Are critical materials physically on site? 3. Are work packs execution-ready? 4. Are isolations and permits defined? 5. Is the restart plan reviewed and tested?
Which Turnaround KPIs Should You Track? A KPI is only useful if it helps the turnaround manager make a decision. Stage
KPI
What it tells you
Before
Work-pack readiness
Whether jobs can actually be executed
Before
Material availability
Which jobs could stall
Before
Engineering completion
Whether design work will hold up planning
During
Critical-path variance
Whether the outage is drifting
During
Scope changes
Early warning of scope-control problems
During
Safety performance
Whether pace is putting people at risk
After
Actual duration vs plan
How the outage performed overall
After
Final cost vs budget
How accurate the estimate was
After
Start-up delay
How well restart was planned
Post-Shutdown Review The turnaround is not over when the plant restarts. The review is where your next outage gets better.
• Compare results with targets. Look at cost, duration, safety and scope completed against the plan.
• Check plant performance. Formal plant performance testing shows whether the outage delivered the gains you wanted.
• Record discovery work. Note what crews found inside equipment. This sets a more realistic allowance next time.
• Investigate failures. A forensic failure analysis finds the root cause of any failure so it does not return.
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• Assign lessons learned. Give each lesson an owner and build it into the next turnaround planning cycle. Otherwise it becomes a document nobody reads.
• Close out records. Update drawings, equipment records and maintenance plans.
When Should You Use an Owner’s Engineer for a Turnaround? External support is most useful when internal teams are stretched or the outage carries high risk. Consider an owner’s engineer when:
• the scope includes complex modifications or major capital works • several contractors must work in the same areas • specialist testing such as FAT and SAT is needed • commissioning and start-up are complex • the outage has little schedule contingency An owner’s engineer acts on your behalf, reviews designs, manages vendors and checks that contractors deliver what was agreed. This keeps the turnaround tied to your goals, not a contractor’s.
Frequently Asked Questions What is the difference between a shutdown and a turnaround? A shutdown is any time a plant, or part of it, stops running. It can be planned or unplanned. A turnaround is a large, planned shutdown where major maintenance, inspection and upgrade work is done together. Every turnaround is a shutdown, but not every shutdown is a turnaround. How far in advance should a turnaround be planned? Many large turnarounds need 12 to 24 months of planning, and complex outages may need more. Smaller shutdowns may need only a few months. Starting plant shutdown and turnaround planning late is a common cause of overruns. What causes turnaround overruns? The main causes are scope creep, unplanned discovery work, late materials, poor work packs, unclear decision rights and weak start-up planning. An early scope freeze, a discovery allowance, early ordering, FAT and SAT, and clear roles reduce these risks. Who manages a plant turnaround? The asset owner is responsible and usually appoints a turnaround manager to lead it. That manager works with an owner’s engineer, EPC contractors and onsite trade crews while keeping control of scope, budget, schedule and risk. How do you control scope creep during a shutdown? Set a firm scope freeze date. After that, every new job needs a formal change request showing its cost, schedule, safety and critical-path impact. Only the turnaround manager or a change board should approve it. What is a turnaround readiness review? A readiness review is a formal check held before the outage. It confirms that scope, work packs, materials, permits, isolations, people and the restart plan are ready. Gaps are fixed, or the risk is formally accepted, before the shutdown date is confirmed.
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Plan Your Next Turnaround Good plant shutdown and turnaround planning comes down to a few basics. A clear purpose, a firm scope freeze, tested equipment, defined roles and an honest review make the difference between an outage that runs to plan and one that does not. Planning a major plant shutdown or turnaround? Sarom Global supports asset owners across Australia, EMEA, Asia Pacific and the Americas with owner’s engineering, onsite engineering and trades, FAT and SAT, commissioning support and forensic failure analysis. Talk to our team about the engineering and execution support your next outage needs, or explore our onsite engineering and trades services.
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Sarom Global | Plant Shutdown and Turnaround Planning
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