TL;DR
Shutdown, turnaround, and outage surveys are precision measurement services conducted during planned maintenance windows when industrial plants stop production. A typical processing plant shutdown lasts 7-21 days and every hour costs $50,000-200,000 in lost production. Survey work that isn't planned, staffed, and executed efficiently becomes a critical path item that extends the outage. This guide covers what shutdown surveys involve, how to plan them, and how to ensure your survey support doesn't become the bottleneck.
Key Takeaways
- Shutdown surveys cover pre-shutdown measurement, in-shutdown alignment and verification, and post-shutdown as-built documentation
- A single day of shutdown extension typically costs $50,000-200,000 in lost production for a mid-sized processing plant (industry maintenance data)
- Survey scope should be locked down 4-6 weeks before shutdown to allow methodology planning, safety documentation, and crew scheduling
- Laser scanning during shutdown captures comprehensive as-built data in hours rather than the days traditional methods require
- The most common shutdown survey services are: dimensional verification, equipment alignment, as-built capture, and clearance measurement
Table of Contents
- What Are Shutdown Surveys?
- Types of Shutdown Survey Work
- The Shutdown Survey Process
- Planning and Pre-Mobilisation
- Safety Considerations
- Equipment and Methodology
- Timeline and Scheduling
- Cost Factors
- Frequently Asked Questions
- What to Do Next
What Are Shutdown Surveys?
A Queensland alumina refinery had planned a 14-day shutdown to replace a section of kiln shell and re-support the cooler. The survey scope—verify tyre positions before work, check alignment after shell replacement, and capture as-built condition—seemed straightforward. But the surveyor arrived on day one to find the work area still under hot work permit, the crane blocking line of sight to control points, and no safe access to the measurement positions. Three days were lost to replanning and waiting. Those three days cost the refinery approximately $450,000 in extended downtime.
Shutdown surveys—also called turnaround surveys, outage surveys, or TAR (Turnaround) surveys—are precision measurement services conducted during planned maintenance events when industrial operations cease. They cover everything from pre-shutdown baseline measurement through in-shutdown alignment and verification to post-shutdown as-built documentation.
The defining characteristic is time pressure. Unlike routine surveys scheduled during normal operations, shutdown surveys operate within a fixed window where every hour is accounted for and the cost of delay is measured in production losses.
Types of Shutdown Survey Work
Pre-Shutdown Survey
Conducted 2-6 weeks before the outage, the pre-shutdown survey captures baseline measurements of equipment condition and position. This data becomes the reference against which post-work measurements are compared.
Typical pre-shutdown scope:
- Rotary equipment centreline and elevation
- Tyre and roller contact patterns
- Clearance measurements for removal access
- Structural reference points for reassembly
- Existing deformation or misalignment documentation
In-Shutdown Survey
The core shutdown survey work conducted during the outage itself:
| Survey Type | Purpose | When Conducted |
|---|---|---|
| Dimensional verification | Confirm equipment positions before reassembly | After removal, before reassembly |
| Alignment survey | Set correct position for replacement components | During reassembly |
| Fit-check survey | Verify clearances for new or modified equipment | Before installation |
| Level and flatness | Confirm foundation and baseplate condition | After cleaning, before rebuild |
| Clearance survey | Verify adequate space for tools, access, removal | Throughout shutdown |
Post-Shutdown Survey
Conducted immediately after work completion and before recommissioning:
- Final alignment verification
- As-built documentation of modifications
- Clearance confirmation for rotating parts
- Structural position verification
As-Built and Documentation Survey
Laser scanning during shutdown captures comprehensive 3D records of the plant condition. This data supports:
- Future maintenance planning
- Modification and expansion design
- Clash detection for future work
- Asset register updates
Key point: The shutdown window is the only time some equipment is accessible for measurement. Capturing comprehensive scan data during shutdown—regardless of immediate need—creates a valuable asset for future engineering work.
The Shutdown Survey Process
Phase 1: Scope Definition (4-6 Weeks Pre-Shutdown)
The surveyor reviews shutdown scope documents, identifies measurement requirements, and develops a detailed methodology. This phase includes:
- Review of shutdown work list and schedule
- Identification of all survey-dependent activities
- Site visit to assess access, hazards, and control requirements
- Development of survey methodology and program
- Preparation of safety documentation
- Confirmation of crew availability and equipment
Phase 2: Pre-Shutdown Measurement (1-4 Weeks Pre-Shutdown)
Baseline measurements captured while plant is still operating or immediately after stop.
Phase 3: In-Shutdown Execution (During Outage)
Survey work conducted in sequence with mechanical activities. The surveyor must be available when the work area is ready—not before, not after.
Phase 4: Post-Shutdown Verification (Before Recommissioning)
Final measurements confirm work quality and provide as-built record.
Phase 5: Reporting (Within 1-2 Weeks of Completion)
Survey reports delivered for engineering review and record.
Planning and Pre-Mobilisation
The difference between a smooth shutdown survey and a problematic one is almost always planning. The following table summarises the do and don't of shutdown survey planning.
| Do | Don't |
|---|---|
| Lock scope 4-6 weeks before shutdown | Leave survey scope to be decided during the outage |
| Conduct a pre-shutdown site visit | Assume the site layout and access are as described |
| Identify survey-critical path activities | Treat all survey work as non-critical |
| Establish survey control before shutdown | Try to set up control in a congested work area |
| Have backup plans for weather and delays | Assume the shutdown schedule will run perfectly |
| Brief the surveyor on the full shutdown context | Provide only a point list without context |
| Confirm safety requirements and permits | Assume standard PPE is sufficient |
Information the Surveyor Needs
To plan effectively, the shutdown surveyor requires:
- Shutdown schedule with survey-dependent activities highlighted
- Scope of mechanical work (what is being removed, replaced, modified)
- Equipment drawings and previous alignment records
- Site safety requirements and induction procedures
- Access arrangements (confined space, working at heights, hot work)
- Contact details for shutdown coordinator and mechanical supervisor
Safety Considerations
Shutdown environments are among the most hazardous survey workplaces. The combination of confined spaces, hot surfaces, residual chemicals, heavy lifting operations, and time pressure creates risks that must be actively managed.
Common Hazards
| Hazard | Mitigation |
|---|---|
| Hot surfaces | Thermal imaging verification, insulated PPE, permit systems |
| Confined space | Confined space entry training, gas monitoring, standby personnel |
| Working at heights | Harness and anchor point verification, scaffolding inspection |
| Mobile plant | Exclusion zones, spotter assignment, radio communication |
| Chemical residue | MSDS review, breathing apparatus if required, decontamination |
| Hot work | Fire watch, permit compliance, fire extinguisher availability |
| Crane operations | Line of sight to crane operator, exclusion zones |
Safety Documentation
Before mobilisation, the surveyor should complete:
- Site-specific safety induction
- Risk assessment for each survey task
- Confined space entry permit (where applicable)
- Hot work permit (where applicable)
- Take 5 / pre-start risk assessment
- Communication plan with shutdown coordinator
Industrial Spatial Solutions surveyors hold current confined space, working at heights, and site safety certifications for the environments we work in.
Equipment and Methodology
Shutdown survey equipment must be reliable, portable, and suited to confined, hazardous environments.
| Equipment | Application | Shutdown Advantage |
|---|---|---|
| Leica MS60 MultiStation | Precision measurement, monitoring | Single instrument for angles, distances, and scanning |
| Leica TS16 total station | General alignment, setout | Robust, fast, proven reliability |
| Leica RTC360 laser scanner | Rapid 3D capture | Comprehensive documentation in minutes per setup |
| Reflectorless measurement | Measurements to inaccessible points | No need for target access |
| Portable control targets | Quick deployment and recovery | Minimal setup time |
The methodology is tailored to the shutdown schedule. Common approaches include:
- Standby attendance: Surveyor on site for the full shutdown, responding to measurement requests as work progresses
- Scheduled attendance: Surveyor attends for specific activities (alignment checks after reassembly, for example)
- Pre-positioned control: Control network established before shutdown so measurement is immediately available
Timeline and Scheduling
A typical shutdown survey timeline for a processing plant:
| Phase | Timing | Duration |
|---|---|---|
| Scope definition and planning | 4-6 weeks pre-shutdown | 1-2 weeks |
| Pre-shutdown site visit | 2-4 weeks pre-shutdown | 1 day |
| Control establishment | 1-2 weeks pre-shutdown | 1-2 days |
| Pre-shutdown measurement | Shutdown minus 1-2 weeks | 1-2 days |
| In-shutdown attendance | Days 1-14 of outage | 5-10 days (intermittent or continuous) |
| Post-shutdown verification | Final 2 days of outage | 1-2 days |
| Reporting | 1-2 weeks post-shutdown | 3-5 days |
The in-shutdown attendance pattern depends on the work schedule. Some shutdowns require continuous survey presence; others need the surveyor for specific windows only.
Cost Factors
Shutdown survey costs are higher per day than routine surveys due to the specialised requirements: standby availability, safety certifications, after-hours work, and the premium on reliability.
| Service Component | Indicative Rate | Notes |
|---|---|---|
| Planning and pre-shutdown site visit | $2,000-3,500 | Fixed fee |
| Control establishment | $2,500-3,500 | Per day |
| In-shutdown attendance (scheduled) | $3,000-4,500 | Per day, 10-hour shift |
| In-shutdown attendance (standby) | $2,500-3,500 | Per day retainer, plus call-out |
| After-hours / night shift | +25-50% | Shift loading |
| Laser scanning (additional) | $3,000-4,500 | Per day |
| Reporting | $1,500-2,500 | Fixed fee |
A typical processing plant shutdown survey program ranges from $15,000 for a limited scope to $60,000+ for comprehensive attendance on a major turnaround.
The cost of not having survey support—measured in extended downtime, rework, and recommissioning delays—far exceeds the cost of professional survey attendance.
Frequently Asked Questions
When should I book a surveyor for shutdown work?
Ideally, 4-6 weeks before the shutdown date. This allows time for scope definition, site visit, safety documentation, and crew scheduling. Last-minute bookings often result in unavailable crews, rushed planning, and higher costs.
What happens if the shutdown schedule changes?
Schedule changes are common. The best approach is to build flexibility into the survey engagement—either standby attendance or confirmed availability with short-notice mobilisation. Communicate schedule changes to the surveyor as soon as they are known.
Can survey work extend the shutdown duration?
Only if it is poorly planned. Well-planned shutdown survey work runs parallel to mechanical activities and should never be on the critical path. The surveyor measures when the work area is ready and reports before the next activity starts.
What deliverables do I receive after a shutdown survey?
Deliverables typically include: alignment reports with deviation tables, as-built survey plans, laser scan data (where captured), and a summary report. Format and detail are agreed during scope definition.
Do shutdown surveyors need specific safety training?
Yes. In addition to standard construction safety inductions, shutdown surveyors typically need confined space entry, working at heights, and site-specific hazard training. Industrial Spatial Solutions surveyors hold current certifications for the environments we work in.
What to Do Next
Shutdown surveys are not a commodity purchase. The right provider understands shutdown dynamics, has the safety credentials, carries reliable equipment, and can adapt when the schedule changes—as it always does.
- Review your upcoming shutdown schedule. Identify activities that require measurement, alignment verification, or as-built capture.
- Define the survey scope early. What needs measuring, when, and to what tolerance?
- Engage ISS for planning. We will review your shutdown schedule, recommend a survey program, and provide a fixed or schedule-of-rates proposal.
Call 0407 057 015 or visit industrialspatial.com to discuss shutdown survey support for your next turnaround. We have supported shutdowns across mining, processing, and manufacturing operations throughout Australia.
Related articles:
- [Mechanical surveys for mill and kiln alignment](internal link)
- [Laser scanning for as-built documentation](internal link)
- [Dimensional control for industrial plants](internal link)
- [Engineering surveys for construction projects](internal link)