Paint Shop Planning—From Floor Plan to First Spray | Article 21 of 28
Change Orders: Where Paint-Shop Budgets Go to Die
A change that takes five minutes to request can take five weeks and thousands of dollars to complete.
A change order is a written modification to the agreed project scope, price, schedule, or responsibilities. Some changes are reasonable and unavoidable. Existing buildings hide surprises. Authorities may require revisions. Production needs may change. Equipment can be delayed or discontinued.
Other change orders are created by incomplete planning, unclear specifications, unverified utilities, missing equipment, late decisions, or verbal instructions given in the field.
The goal is not to eliminate every change. The goal is to identify changes early, understand their complete effect, obtain approval before work proceeds, and preserve a clear record of what changed and why.
The workman’s rule: There is no such thing as a small change after fabrication begins. Somewhere, somebody has to redesign it, rebuild it, reschedule it, or work around it.
1. Understand Why Change Orders Happen
Paint-shop change orders usually begin in one of several predictable places.
Common causes of change orders
- Incomplete Owner’s Project Requirements
- Unclear equipment specifications
- Unverified field dimensions
- Incorrect building drawings
- Unknown underground or overhead utilities
- Unverified electrical, gas, or compressed-air capacity
- Late product or coating changes
- Missing work in the responsibility matrix
- Permit or inspection comments
- Unforeseen structural conditions
- Owner-requested upgrades
- Vendor substitutions
- Construction damage
- Schedule acceleration
- Work performed from obsolete drawings
Review these risks before issuing the purchase order. Problems that are predictable can often be resolved before they become expensive.
2. Establish a Project Baseline
A change cannot be evaluated unless the original agreement is clear. Establish a documented baseline before work begins.
The baseline should include:
- Signed contract or purchase order
- Final equipment specification
- Approved proposal
- Accepted deviations and alternates
- Responsibility matrix
- Approved drawings
- Project schedule
- Payment milestones
- Performance and acceptance requirements
- Applicable addenda and clarifications
Date and identify the revision of every baseline document. Otherwise, the team may disagree about which drawing or scope was actually approved.
3. Define What Constitutes a Change
The contract should define which events require a formal change order.
Examples include:
- Adding or removing equipment
- Changing equipment size or capacity
- Changing materials of construction
- Relocating equipment or utilities
- Changing installation responsibilities
- Changing performance requirements
- Accelerating or delaying the schedule
- Changing approved drawings
- Requiring overtime or special access
- Changing testing, training, or documentation requirements
Corrections required because a contractor failed to meet the original agreement may not qualify as owner-funded changes. The contract should explain how such disputes are handled.
4. Control Who May Authorize a Change
Not everyone attending a meeting or walking through the jobsite should have authority to change the project.
Identify:
- Who may request a change
- Who reviews technical effects
- Who reviews safety and code effects
- Who approves cost
- Who approves schedule changes
- Who may authorize work to begin
- Who updates the official documents
A field conversation is not a purchase order. Contractors should not proceed with changed work based only on an informal instruction unless an immediate safety condition requires emergency action under an established procedure.
5. Use a Written Change Request
Every proposed change should begin with a numbered written request. The request should describe the change without prematurely authorizing the work.
Change-request information
- Unique change-request number
- Date submitted
- Person and company requesting the change
- Reason for the request
- Description of existing requirement
- Description of proposed change
- Affected drawings and specifications
- Required decision date
- Known safety, code, quality, and production effects
- Photographs or sketches where useful
Keep change requests separate from approved change orders. A request is an idea awaiting evaluation. A change order is an authorized modification.
6. Find the Root Cause
Before approving a change, determine why it is needed. The answer helps assign responsibility and prevents the same problem from appearing elsewhere.
Owner-directed change
The owner requests added capacity, features, relocation, acceleration, or another improvement.
Unforeseen condition
A concealed site condition differs materially from the available project information.
Design coordination issue
Drawings, dimensions, systems, or responsibilities conflict or leave a gap.
Correction of nonconforming work
Work does not meet the approved drawings, specifications, listing, or contract.
The person identifying the problem is not automatically the person responsible for its cost.
7. Evaluate Technical Effects
A change in one system can affect several others. Moving an exhaust duct may change pressure loss, structural loading, roof work, fire protection, electrical routing, and maintenance access.
Review the effect on:
- Product flow and production capacity
- Booth airflow and building pressure
- Heating and cure performance
- Electrical loads and hazardous-location boundaries
- Fire suppression and alarm interfaces
- Natural-gas and compressed-air systems
- Structural supports
- Roof and wall penetrations
- Environmental permits
- Maintenance access
- Equipment listing and warranty
- Future expansion
Obtain written technical review from the responsible designers and equipment manufacturers.
8. Evaluate Safety and Code Effects
A field modification can affect equipment approvals and required safeguards even when the physical change appears minor.
Determine whether the change affects:
- Equipment listing or certification
- Hazardous-location classification
- Required ventilation
- Fire-protection coverage
- Exit access or egress
- Emergency-stop operation
- Grounding and bonding
- Burner or fuel-train safety
- Permit documents
- Required inspections
- Insurer approval
Submit revised information to the Authority Having Jurisdiction when required. Approval of the original design does not automatically approve later changes.
9. Require a Detailed Cost Breakdown
A change-order proposal should show enough detail for the owner to evaluate whether the cost is reasonable.
Request separate costs for:
- Engineering and drawings
- Equipment and materials
- Shop fabrication
- Field labor
- Supervision
- Freight and expediting
- Rigging and equipment rental
- Demolition and rework
- Permits and inspection fees
- Testing and commissioning
- Overhead and markup
- Applicable taxes
- Credit for deleted work
Require documentation for major material, subcontractor, or freight costs when appropriate.
10. Include Credits for Removed Work
A change may add one item while eliminating another. The change-order price should include both additions and credits.
If a standard motor is replaced by a premium motor, the change is not necessarily the full price of the premium motor. The owner may be entitled to credit for the motor no longer being supplied.
A fair change order counts what is added, what is removed, and what has already been purchased or fabricated.
11. Evaluate Schedule Effects
A change can affect the project even when its direct price is modest.
Require the contractor or vendor to identify:
- Engineering time
- Revised drawing and approval time
- Material lead time
- Fabrication time
- Effect on shipment
- Effect on installation sequencing
- Effect on permits and inspections
- Effect on startup and training
- Effect on production shutdowns
- Effect on final completion
The approved change order should state the agreed schedule effect. Silence can become a dispute when the project finishes late.
12. Understand the Cost of Acceleration
Asking a contractor to recover schedule time can require overtime, additional crews, expedited freight, split shipments, special fabrication, or inefficient trade sequencing.
Before authorizing acceleration, determine:
- Which activities are actually controlling completion
- Whether acceleration can recover meaningful time
- Additional labor and supervision costs
- Expedited material and freight costs
- Effect on safety and quality
- Effect on other contractors
- Required owner decisions and site access
Working faster is not always the same as finishing sooner.
13. Protect Long-Lead Equipment Decisions
Fans, burners, control panels, specialty lights, fire-protection equipment, structural steel, switchgear, and custom components may have long lead times.
Before changing a long-lead item, confirm:
- Whether the original item has been ordered
- Cancellation or restocking charges
- Availability of the replacement
- Effect on fabrication
- Effect on equipment listing
- Compatibility with other components
- Effect on warranty
- Shipping and installation consequences
Late substitutions should receive the same technical review as original equipment.
14. Do Not Approve Price Without Scope
The change order should clearly describe what the price buys.
It should state:
- Equipment and work included
- Equipment and work excluded
- Drawings to be revised
- Responsibilities changed
- Testing required
- Documentation required
- Warranty effect
- Schedule effect
- Payment terms
“Modify ductwork—$12,500” does not provide enough information to control the work or later verify completion.
15. Do Not Approve Scope Without Price and Schedule
The opposite mistake is authorizing the work and promising to settle price later. Once changed work is completed, the owner loses much of the ability to evaluate alternatives or negotiate cost.
When exact cost cannot be established in advance, use a written time-and-material authorization with:
- A defined scope
- Approved labor rates
- Approved material markup
- Daily signed work tickets
- Required receipts
- A not-to-exceed amount
- A stop-work notification threshold
16. Separate Emergency Work From Ordinary Changes
An immediate condition may threaten people, property, equipment, or ongoing construction. The project should have a limited emergency-work procedure.
The procedure should identify:
- Who may authorize emergency action
- What contractors may do without normal prior approval
- How costs will be documented
- When management must be notified
- How temporary work will be reviewed
- How permanent correction will be approved
Emergency authority should not become a shortcut around normal change control.
17. Track Potential Changes Before They Become Claims
Maintain a potential-change log from the beginning of the project.
Recommended change-log fields
- Change-request number
- Description
- Root cause
- Requesting party
- Responsible reviewer
- Estimated cost
- Estimated schedule effect
- Required decision date
- Current status
- Final disposition
- Approved change-order number
Review the log during every project meeting. A potential change ignored for three weeks may become an emergency when fabrication reaches that part of the equipment.
18. Maintain a Contingency—But Protect It
A project contingency provides funding for legitimate unknowns. It is not free money available for every attractive option.
Establish:
- The total contingency amount
- Who controls it
- What types of costs may use it
- Approval thresholds
- Reporting requirements
- Remaining balance after each change
Separately track owner upgrades, design corrections, unforeseen conditions, and contractor-responsibility issues. This helps the organization learn where project costs actually changed.
19. Watch for Scope Creep
Scope creep occurs when small additions accumulate without formal review of their combined effect.
Examples include:
- Adding “just one more” control feature
- Relocating doors repeatedly
- Increasing booth dimensions after design approval
- Adding products to the process range
- Changing coating technology
- Increasing production without revisiting capacity
- Adding reports, sensors, or data connections late
- Expanding training or startup scope informally
Each request may appear reasonable by itself. Together, they can affect equipment size, utilities, code review, fabrication, software, and delivery.
20. Control Drawing Revisions
Every approved change affecting the design should result in updated drawings and specifications.
Revised documents should show:
- Revision number and date
- Description of the change
- Change-order reference
- Affected dimensions and connection points
- Required approvals
- Updated responsibilities
Remove or clearly mark obsolete drawings. Work constructed from an old drawing may have to be removed even when the installation crew performed it correctly.
21. Document Verbal Discussions
Jobsite conversations are necessary, but important decisions should be confirmed in writing.
A written confirmation should record:
- Date and location
- People present
- Condition discussed
- Proposed direction
- Whether work is authorized
- Required follow-up
Meeting minutes documenting a discussion do not automatically authorize additional cost. Use the contract’s formal change-approval process.
22. Reject Incomplete Change Proposals
Return a proposal for clarification when it lacks enough information for an informed decision.
Do not approve until the proposal explains:
- Why the change is required
- What work is included
- What work is excluded
- How the cost was developed
- What credit is included
- How the schedule changes
- Whether permits or approvals are affected
- What drawings will be revised
- How performance and warranty are affected
23. Verify Changed Work Before Payment
Approval of a change order does not prove that the changed work was completed correctly.
Before payment, verify:
- Equipment and materials match the approved change.
- Installation is complete.
- Required inspections are approved.
- Performance has been tested.
- Safety and control functions operate correctly.
- Deficiencies have been corrected.
- Drawings and manuals have been updated.
- Deleted work has been credited.
24. Close the Change Into the Final Record
Every approved change should be incorporated into the final project documents.
Update:
- As-built drawings
- Equipment lists
- Utility schedules
- Control sequence
- Responsibility matrix
- Operating and maintenance manuals
- Spare-parts lists
- Inspection and test records
- Warranty information
- Final contract value
Future operators and maintenance personnel should not have to search through a stack of change orders to discover how the system was finally built.
25. Learn From the Change Log
At project closeout, review every change and group it by cause.
Ask:
- Which changes were unavoidable?
- Which resulted from incomplete planning?
- Which resulted from late owner decisions?
- Which resulted from missing field information?
- Which resulted from design or trade coordination?
- Which resulted from code or permit review?
- Which resulted from contractor performance?
- What should be done differently on the next project?
The change-order record can become a valuable planning tool instead of merely a history of additional cost.
Questions to Ask Before Approving a Change Order
- Why is the change necessary?
- Is it already included in the original contract?
- Who is responsible for the condition?
- What alternatives were considered?
- What is the complete technical effect?
- Does it affect safety, permits, or equipment listings?
- Is the cost itemized and are credits included?
- How does it affect the schedule?
- Which drawings and documents must be revised?
- Who has authority to approve the change?
Knowledge Check
- What is the difference between a change request and an approved change order?
- Why is an established project baseline necessary?
- What four major effects should be reviewed before approving a change?
- Why should deleted work be credited?
- What is scope creep?
- Why must approved changes be incorporated into the final as-built record?
Planning and contractual notice: This article provides general educational information and is not legal, engineering, financial, safety, or construction-contract advice. Change-order rights and responsibilities depend on the signed contract and applicable law. Project changes should be reviewed by qualified technical, contractual, financial, safety, and legal professionals as appropriate before work is authorized.
Next in the series: Article 22 of 28—Pre-Startup Inspection and Documentation
The booth is assembled and the wiring looks complete, but that does not mean the system is ready to run. Article 22 explains how to inspect the installation, verify utilities and safeguards, close critical deficiencies, collect essential documents, and determine whether startup can begin safely.
