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newSchoolWorks.com › VoTechWorks › Transportation › Auto Body & Collision › Capstone Project: Full-Cycle Collision Repair › Lesson 1
TRN-AUTO25-07 · Lesson 1 · 40 clock hours · lab

Damage Assessment, Repair Planning, and Estimating

Objective. Given an assigned damaged vehicle, the student will write a complete, documented repair plan and computer-generated estimate that identifies all structural and cosmetic damage, lists correct OEM part numbers or repair procedures, and falls within ten percent of the instructor's master estimate.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a certified examiner or master technician in the trade or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.

VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.

Damage Assessment, Repair Planning, and Estimating

A professional repair begins long before anyone picks up a hammer or a spray gun. The ability to find all the damage, price the repair accurately, and sequence the work correctly is what separates a technician from a skilled collision repair professional. This lab brings every skill you have learned into a single, industry-realistic task.

Why Thorough Assessment Matters

Collision energy travels. A rear-quarter impact that collapses a panel can simultaneously push the rear rail inward, crack a floor brace, and misalign a door opening—none of which is visible from outside the car. Missing hidden or secondary damage means the vehicle returns to the shop, the customer loses trust, and the insurer disputes the supplement. I-CAR's Damage Analysis curriculum recognizes three damage zones: primary damage (the direct contact area), secondary damage (areas deformed by energy transfer), and hidden damage (damage concealed by trim, undercoating, or adjacent panels). All three zones must be documented before the estimate is written.

The 360-Degree Inspection

Start at one corner and walk the entire vehicle, photographing every panel gap, crease, and misalignment. Then check underneath and inside the trunk or cargo area. Use a body-line gauge and gap tool to measure door, hood, and deck-lid gaps against OEM specifications found in the repair manual or ALLDATA. Pull all trim, carpet edges, and access covers from the damaged zone. Measure the frame or unibody with a tram gauge or dimensional reference chart before assuming the structure is straight. Record every finding—including items that appear undamaged—on the damage-analysis worksheet. Photographs are timestamped evidence; take more than you think you need.

Safety during inspection: Wear safety glasses and nitrile gloves when probing damaged areas; sharp metal edges and broken glass are common hazards. If the vehicle has deployed airbags or live pyrotechnic pretensioners, treat the SRS system as potentially active and consult the OEM repair manual before reaching near steering columns or seat-belt anchors. Never place yourself under an unsupported vehicle—use approved jack stands rated for the vehicle weight.

Building the Estimate in Estimating Software

CCC ONE and Mitchell Cloud Estimating are the two platforms you will encounter most often in the industry. Both pull current OEM part prices, labor times (expressed in hours), and refinish times from regularly updated databases. To build a line-item estimate:

1. Enter the vehicle's VIN so the system decodes the exact trim level and option packages.

2. Select the damaged assembly from the parts-and-labor tree.

3. For each part, choose repair or replace based on damage severity. I-CAR guidance states that a part should be replaced when repair time exceeds replacement time, when structural integrity is compromised, or when the OEM requires it.

4. Add related operations: corrosion protection, blend panels, weld-through primer, and alignment checks.

5. Apply applicable overlap deductions when multiple adjacent panels share refinish time.

6. Review the totals—parts, labor, and refinish—before printing.

Never guess part numbers. Use the VIN-decoded parts tree in the estimating software or cross-reference the OEM parts catalog. An incorrect part number on an approved estimate can stall a repair for days.

Writing the Narrative Repair Plan

The estimate tells the shop what to do and how much it costs; the repair plan tells technicians in what order to do it and what resources they need. A proper sequence prevents costly rework. For example, corrosion protection must be applied to bare metal before a new panel is installed—not after. Frame and structural repairs must be completed and verified dimensionally before any panel fitment begins.

A one-to-two page repair plan should cover:

Accuracy Standard

Your estimate must fall within ten percent of the instructor's master estimate for total labor and parts cost, and must capture every structural damage item. The narrative repair plan must sequence operations correctly and include PPE and SDS references. Both elements are evaluated together—a precise dollar figure does not compensate for a repair plan that skips corrosion protection or misequences structural work.

Connecting to Your Credentials

ASE B-series tests cover damage analysis, estimating principles, and repair planning across multiple exam areas. I-CAR ProLevel role requirements include demonstrated competence in damage analysis and estimating. This lab directly mirrors the on-the-job tasks those credentials assess, making today's work both a capstone and a credential-preparation activity.

Key terms9

Primary damageDirect-contact damage at the point where the colliding force first struck the vehicle.
Secondary damageDamage caused by energy traveling away from the primary impact zone into adjacent panels, rails, or floor structures.
Hidden damageDamage that is not visible without removing trim, undercoating, or adjacent panels; often found during teardown.
Line-item estimateAn estimate in which every repair or replace operation, part number, labor time, and refinish time is listed as a separate entry, allowing line-by-line review.
Overlap deductionA reduction in refinish labor time applied when two adjacent panels are refinished together, sharing setup and blending time.
Repair plan (narrative)A written document that sequences all repair operations from disassembly to quality control, listing consumables, safety measures, and estimated cycle time.
Cycle timeThe total elapsed time from vehicle check-in to customer delivery, encompassing all repair, refinish, and administrative steps.
Weld-through primerA zinc-based primer applied to bare metal flanges before welding to provide corrosion protection in areas that cannot be coated after the weld is complete.
SDS (Safety Data Sheet)A standardized document required by OSHA's Hazard Communication Standard that identifies a product's hazards, safe handling procedures, required PPE, and first-aid measures.

Worked examples4

1. The estimating software shows a replacement quarter panel at $487.00 in parts and 8.2 labor hours at a shop rate of $55.00 per hour. Refinish time is listed as 4.5 hours at a paint labor rate of $55.00 per hour. What is the total estimated cost for this single line item before tax and materials?
  1. Calculate body labor cost: 8.2 hours × $55.00 = $451.00
  2. Calculate refinish labor cost: 4.5 hours × $55.00 = $247.50
  3. Add parts cost: $487.00
  4. Sum all three: $451.00 + $247.50 + $487.00 = $1,185.50
Answer: The total estimated cost for this line item is $1,185.50 before tax and paint materials.
2. Your printed estimate totals $3,840.00. The instructor's master estimate totals $4,150.00. Are you within the required ten-percent accuracy threshold, and by how many dollars are you off?
  1. Calculate ten percent of the master estimate: $4,150.00 × 0.10 = $415.00
  2. Find the allowable range: $4,150.00 − $415.00 = $3,735.00 (low end); $4,150.00 + $415.00 = $4,565.00 (high end)
  3. Check whether $3,840.00 falls between $3,735.00 and $4,565.00 — it does.
  4. Calculate the dollar difference: $4,150.00 − $3,840.00 = $310.00
Answer: Yes, you are within the ten-percent threshold. Your estimate is $310.00 below the master estimate, which is within the $415.00 allowable variance.
3. A door has a measured gap of 7 mm on the leading edge. The OEM specification listed in the repair manual is 4 mm ± 1 mm. How far out of specification is the gap, and what does this indicate?
  1. Determine the maximum allowable gap: 4 mm + 1 mm = 5 mm
  2. Subtract the maximum allowable gap from the measured gap: 7 mm − 5 mm = 2 mm out of specification
  3. A gap that is wider than specification on the leading edge typically indicates the hinge pillar or rocker has been pushed rearward, or the door opening has been distorted — this is a structural/secondary damage finding that must appear on the estimate.
Answer: The gap is 2 mm outside the maximum allowable specification, indicating probable secondary structural damage to the hinge pillar or door opening that must be documented and estimated.
4. Two adjacent panels — a rear door and a quarter panel — each have a full refinish time of 3.0 hours. The estimating software applies a 1.0-hour overlap deduction when both panels are refinished at the same time. What is the total refinish time billed, and how much time is saved versus refinishing them separately?
  1. Calculate combined refinish time without deduction: 3.0 + 3.0 = 6.0 hours
  2. Apply the overlap deduction: 6.0 − 1.0 = 5.0 hours billed
  3. Calculate time saved: 6.0 − 5.0 = 1.0 hour saved
Answer: Total billed refinish time is 5.0 hours. Refinishing both panels together saves 1.0 hour compared with refinishing them at separate times.

The math in this lesson1

Learners multiply body and refinish hours by the $55 shop rate and add parts for a $1,185.50 line item.
A-SSE.1
Brush up in the math halls at newSchoolWorks.com:
In class: Perform a 360-degree visual and dimensional inspection of the assigned vehicle; photograph every damaged area and record findings on a damage-analysis worksheet, noting primary, secondary, and hidden damage zones. · Use shop estimating software (CCC ONE or Mitchell Cloud Estimating) to build a line-item estimate, selecting repair or replace for each affected part based on damage severity guidelines from the I-CAR Damage Analysis course area; print and mark up the estimate with the instructor. · Write a one-to-two page narrative repair plan that sequences all operations—frame pull, panel work, weld replacement, corrosion protection, and refinish—and identifies required consumables, safety measures, and estimated cycle time.
Materials: Assigned collision-damaged vehicle, inspection mirror, pry bar, tape measure, body-line gauge, gap tool, digital camera or smartphone, estimating workstation with CCC ONE or Mitchell software, OEM repair manual or ALLDATA subscription, I-CAR Damage Analysis reference guide, damage-analysis worksheets
Check: Instructor compares student estimate line-by-line against master estimate; student must capture all structural damage items and be within ten percent of total labor and parts cost; narrative repair plan must include correct operation sequence and PPE/SDS callouts — both elements must be satisfactory to advance.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

I-CAR Damage Analysis
1. During a 360-degree inspection of a vehicle with a driver-side front impact, the technician notices the passenger-side front door gap is wider than specification. This finding is BEST described as:
ASE B-series Estimating
2. Before writing a line-item estimate in CCC ONE or Mitchell, the FIRST step is to:
I-CAR Structural Repair / Corrosion Protection
3. When should a technician apply weld-through primer to replacement panel flanges?
ASE B-series Estimating
4. A student's total estimate is $5,500. The instructor's master estimate is $5,000. Which statement is correct?
Safety / OSHA Hazard Communication
5. Which PPE item is specifically required when spraying a two-stage urethane clearcoat that contains isocyanate hardener?
I-CAR Structural Repair
6. In a narrative repair plan, structural frame-pull operations should be sequenced:
I-CAR Damage Analysis
7. What is the PRIMARY purpose of a damage-analysis worksheet completed during vehicle inspection?
ASE B-series Estimating / I-CAR Damage Analysis
8. An estimating software database shows a labor time of 3.5 hours to replace a hood and 4.0 hours to repair the same hood. According to I-CAR damage severity guidelines, the correct decision is to:
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