Build an itemized estimate with clear diagnostic scope.
Record the person, scope, amount and method of authorization.
Control revisions before added work begins.
Reconcile the invoice and preserve approved, declined and pending decisions.
Before you start
Basic repair-order familiarity. This course teaches documentation practice, not a substitute for jurisdiction-specific legal advice.
How to use this workbook
Read each lesson, work through its example, then answer the practice questions before revealing the explanations. Complete the written exercise before taking the assessment. Numerical examples are fictional training data, not vehicle service specifications.
Open study guideFree lessons for anyone. Print or save a PDF copy.
Plan for approximately 20 minutes of reading and 45 minutes working the examples and exercises. Assessment time is separate.
Course material
Study at your own pace. Open each lesson when you’re ready.
Build an estimate a customer can understandRead & apply
Anatomy of an estimate and authorization record
A number alone is not a usable estimate. Scope, evidence and approval must remain connected.
Concern and finding
Explain why work is being proposed.
Scope and exclusions
State what will and will not be done.
Parts, labor and price basis
Make the proposed charge understandable, including applicable tax/fee treatment.
Authorization
Record the decision, person, time and method under the applicable process.
Change and invoice trail
Preserve additions and decisions, then reconcile completed authorized work.
How the parts work together
A recommendation becomes approved work only through the applicable authorization process. A later finding creates a new decision; it does not silently rewrite the original agreement.
Identify and explain
What is lost when an approved estimate is overwritten with a new total?
Check your explanation
The original scope and approval history become unclear. Preserve the original and the proposed change so the final invoice can be reconciled.
An estimate is a decision document, not merely a price. Identify the customer, contact method, vehicle, mileage, date and repair-order reference. Record the concern in the customer's words. Separate diagnosis from a confirmed repair so an inspection authorization is not mistaken for permission to replace parts.
Describe proposed parts and labor in plain language. State quantity, unit price or calculation basis, relevant part condition or selection, diagnostic charges, fees and taxes as applicable. Explain what is included and what is excluded. If a diagnostic charge may be credited toward repair, state the condition clearly rather than allowing the customer to assume it is always waived.
Use evidence to support recommendations. A measurement, photograph with context or test result is more useful than “recommended by technician.” Do not list an unconfirmed cause as proven. Separate urgent safety findings, repairs, scheduled maintenance and optional choices. Applicable estimate and disclosure requirements vary; use the current approved form and local requirements.
Read the estimate as if you had not spoken to the advisor. Can you identify the proposed work, cost basis, unanswered questions and decision needed?
Build from a finding, not a sales label
An estimate should allow the customer to understand what is proposed and why. Connect the concern to the observed finding, then distinguish diagnosis, repair, maintenance and optional work. “Complete service package” does not describe which operations will occur or what evidence supports them. Identify parts, quantities, labor scope, applicable charges and the total basis clearly enough to compare the proposal with the finished invoice.
Separate a diagnostic allowance from a repair quote. Permission to investigate a symptom does not automatically authorize every repair the investigation might reveal. Explain the point at which you will report findings and seek the next decision. If the cause is not established, do not present a specific part as a confirmed solution merely because the customer asked for a price.
Check the arithmetic and assumptions
For a fictional estimate, parts of $180 and labor of $240 total $420 before disclosed applicable charges and taxes. If an optional $45 operation is offered, make its separate status clear. Do not hide a required charge until pickup or count an optional item in an “approved” total before the customer decides. Record availability and timing assumptions that could change the plan.
Make the estimate readable before asking for approval
Separate the customer's concern, the diagnostic work proposed and any confirmed repair recommendation. A diagnosis charge buys a defined investigation, not necessarily a guaranteed repair. Describe the scope, relevant assumptions, pricing components and expected next decision. If a result is unknown, say so rather than presenting a likely part as confirmed.
A customer should be able to identify what is included and what is not. Use consistent quantities and units, and explain separately disclosed applicable charges. A headline subtotal without its scope is difficult to compare. The fictional arithmetic below teaches transparent calculation; it is not a statement of Florida fee or authorization law.
Authorization follows an understandable proposal
Defined scope
Informed decision
Recorded approval
The approved version, items and amount must remain linked to the customer's decision.
Try it before reading the answer
A customer authorizes diagnosis only. What should be explicit in the estimate?
Worked answer and reasoning
Define the diagnostic scope, charge and next decision point. State that a repair recommendation may follow the findings and requires the applicable separate authorization. Do not present diagnosis approval as blanket permission to replace parts.
Capture a precise authorization recordRead & apply
Authorization links an identified decision-maker to a defined scope and amount. Record who approved, their authority where relevant, the date and time, communication method, approved items and maximum or agreed amount. Retain the relevant signed or electronic record under shop policy and applicable requirements. “Customer said okay” without identifying what was approved is weak evidence.
Confirm the decision back in plain language: “You are approving these two repairs at this total, with this expected timing; the other recommendation remains pending.” Record approved, declined and pending items separately. A voicemail, an unread message or silence is not automatically approval. Possession of keys or earlier diagnosis approval does not automatically expand the scope.
If someone other than the named customer responds, establish their authority using the shop's approved process before accepting the change. Avoid collecting unnecessary personal information. Keep access to customer records limited to the staff who need it.
The exact legal form of authorization depends on jurisdiction and circumstances. This course does not invent a universal dollar allowance for exceeding an estimate. Follow the current approved process before work begins.
Authorization must be traceable to a specific scope
The record should identify the customer or authorized decision-maker, vehicle, repair order, estimate version, selected work, price basis, date/time and the decision captured through the applicable process. A note reading “customer said okay” is weak if nobody can determine which version or items were discussed. Record declined and deferred lines separately from approved lines.
Different jurisdictions and transactions can impose particular estimate, disclosure and authorization requirements. This course teaches the control principle, not a universal legal form or waiver. The shop must use current applicable requirements and an appropriate process for the communication method used. Do not assume that a generic signature eliminates every other requirement.
Prevent internal misunderstanding
The technician's job instructions should reflect the latest authorized scope, not the entire proposed estimate. If a customer approves brakes but declines a filter, both may remain visible on the document, but only the approved work is released. A manager or advisor's internal instruction does not itself substitute for the required customer decision. Reconcile the release before work starts.
Record who approved exactly what
A useful authorization record identifies the decision-maker, approved estimate version, selected items, amount, date/time and method. Verify that the person is authorized to decide under the shop's process. Possession of the vehicle or a familiar caller's name is not an unlimited authorization record.
Keep approved, declined and pending work distinct. An approval for one item does not convert the rest of an inspection into approved work. When recording a conversation, use factual wording and preserve the relevant scope. Do not backfill a missing approval with an invented call or assume silence means consent. Use the shop's current legally reviewed process for actual transactions.
A traceable decision
PersonAuthorized decision-maker
VersionThe proposal they actually reviewed
ScopeSelected items and amount
RecordTime, method and decision
Try it before reading the answer
The customer approves two of three items. What should the technician's work list show?
Worked answer and reasoning
Only the two approved items under their stated conditions. The remaining item stays declined or pending according to the actual decision. Retain the complete proposal and decision history without presenting unapproved work as authorized.
Manage added work and changed promisesRead & apply
A new finding creates a new decision, not automatic permission. Pause the affected unapproved work and prepare a revision describing the evidence, proposed scope, cost difference and time impact. Keep the original estimate linked to the revision so anyone can understand what changed. Avoid overwriting the old version as if it never existed.
Explain the options without pressure. If a component is worn but its cause is unconfirmed, distinguish the established condition from further diagnostic work. Describe any evidence-based operating concern accurately, without inventing urgency to force a sale. If a part substitution changes specification, warranty, price or timing, obtain the appropriate decision before proceeding.
Update the promised timeline when parts availability, testing or customer decisions change it. A useful update states known facts, an honest estimate of timing, the decision needed and the next update point. Contact the customer before a missed promise when possible, even if there is no final repair answer yet.
If the customer declines, preserve the finding and decision. Explain documented implications and follow the shop's escalation process for an unsafe condition. A disclaimer does not itself make a vehicle safe.
Make a revision understandable
When new evidence changes the plan, preserve the original version and create a clear revision. State the new finding, additional or changed operation, cost difference, revised total and timing impact. Explain uncertainty rather than promising an outcome the diagnosis does not support. An added part should not disappear into a renamed package that obscures the change.
Suppose an authorized total is $420 and a proposed additional operation is $90 under the same exercise assumptions. Communicate both “an additional $90” and “a revised total of $510,” then record the decision for the revision. If the customer declines, retain that decision and confirm what the remaining authorized scope can appropriately accomplish.
A timing change also needs communication
Do not wait until the customer arrives to reveal a known delay. Explain the dependency, what action is underway and when the next update will occur. Supplier estimates should not become guaranteed completion promises. Record the update and its owner so another employee can continue the conversation without guessing what was promised.
Work a revision without erasing history
A changed scope needs a linked revision and an informed decision through the applicable process. Preserve the earlier version so the change is understandable. Explain why the additional work is proposed, how it changes cost and timing, and which work must pause pending a decision. Internal manager approval is not the customer's required authorization.
In the fictional example, the original approved scope is $420 before other disclosed applicable charges. A separate proposed item costs $135. If the customer accepts it, the revised subtotal is $555. Until acceptance, the proposal is not an authorized $555 scope. Do not invent a universal amount that can be added without approval.
Fictional revision ledger
Version / item
Amount
Decision
Original scope
$420
Approved
Added item
$135
Pending until accepted
Revised subtotal
$555
Only after the added decision
Try it before reading the answer
An added $85 item is also proposed but declined. What is the approved subtotal after accepting the $135 item?
Worked answer and reasoning
The approved subtotal remains $555: $420+$135. Keep the declined $85 recommendation in the record, but do not add it to approved work or charges. Any other applicable charges must be handled as disclosed through the actual process.
Reconcile the invoice and close the recordRead & apply
Before delivery, compare each invoice line with the approved estimate or revision. Confirm that quantities, parts, labor, fees, credits and taxes reflect what was authorized and performed. Resolve unexpected differences before presenting the vehicle as ready for payment. A technically successful repair can still produce a preventable dispute if the invoice does not match the decision record.
Explain the work performed and verification results, then identify declined or deferred items separately. State applicable written warranty terms and any relevant limits without promising coverage beyond the actual policy. Provide a clear contact path for questions and follow-up. A review request should not replace the repair explanation.
Keep the concern, inspection evidence, estimates, revisions, authorizations, parts/service records, final invoice and relevant communications together under the retention policy. Preserve original timestamps and avoid backdating. If a correction is needed, add a clear correction trail rather than silently changing the history.
Use a final self-check: Can another advisor reconstruct who approved what, why the work was recommended, how the final price was calculated and what remains incomplete? If not, complete the record before handoff.
Reconcile before asking for payment
Compare the invoice with the latest authorized scope and the work actually completed. Check quantities, descriptions, agreed price basis, applicable charges, credits and any authorized changes. An estimate line is not proof that work occurred; a technician's completion note is not proof that added work was authorized. Both comparisons matter.
Resolve discrepancies before pickup through the applicable policy and requirements. Do not ask the customer to sign a retroactive statement that inaccurately says approval existed earlier. Preserve the sequence of events and escalate uncertainty. A clear record protects the integrity of the transaction more effectively than trying to make every document appear identical after the fact.
Explain the finished job
Walk through the approved work, verification result, remaining recommendations and relevant instructions. Provide the appropriate records and terms. If a condition remains unresolved, identify it plainly and state the next proposed step. The goal is that the customer and the shop share the same understanding of what was requested, approved, performed and charged.
Reconcile before delivery
Compare the final invoice with the approved scope, revisions and work actually performed. A mismatch should be investigated and resolved, not hidden behind a revised total. Keep product substitutions, changed coverage and other material differences visible in the decision record.
At delivery, explain performed work, verification, actual warranty terms and remaining recommendations. Avoid promises broader than the written terms or measured outcome. A clear invoice and handoff allow the customer to understand both what they purchased and what remains unresolved.
Final reconciliation
ScopeOriginal approval and accepted changes
WorkWhat was actually performed
InvoiceItems and amounts match the record
HandoffResults, coverage and open items
Try it before reading the answer
The invoice includes a recommendation marked declined. What should happen before delivery?
Worked answer and reasoning
Investigate the mismatch and correct the invoice/work record through the appropriate process. Do not fabricate approval or assume the invoice itself establishes permission. Explain the resolved record clearly to the customer.
Case conference: an additional finding after approval
A customer authorized a fictional $480 scope. During that work, the shop identifies a separate $160 recommendation. The customer has not yet responded. This exercise teaches records and communication; applicable legal requirements and the shop's authorization process still govern the job.
Case evidence — read before choosing an action
Record
Amount
Status
Original scope
$480
Authorized; retain original record
Additional recommendation
$160
Proposed; not yet authorized
Potential revised total
$640
Only if approved as applicable
Customer response
Pending
Do not treat as consent
Work through the decision
Preserve the original estimate and approval rather than silently editing its total. The added recommendation needs a description, supporting finding, scope, price basis and effect on completion time. State whether quoted amounts include applicable taxes and fees; do not hide an assumption in a total.
An unanswered message does not authorize additional work. Explain the choice and document the person's response through the required process. If the customer declines, record that choice and any relevant safety information accurately without describing the declined work as completed. A safety concern may require escalation and a changed release plan, not unauthorized repair.
At invoicing, reconcile each completed item with its authorized scope and document any approved changes. The customer should be able to understand why the invoice differs from the first estimate. A clear audit trail includes who approved what, when, through which method and any limitations. Good transparency prevents disputes more effectively than a long generic disclaimer.
Your decision and evidence
Draft a change request and list what must remain visible in the record if the added recommendation is declined.
Model answer and reasoning
Explain the new finding and $160 proposal, state the potential $640 total on a clearly described tax/fee basis and give the timing impact. Ask for an explicit decision. If declined, retain the original $480 approval, proposed addition, response and relevant advice; do not overwrite history or imply the addition was performed.
Check your work
Separates proposed from approved
Preserves the original authorization
Reconciles the final invoice to actual approved work
Write your decision before revealing the model answer. These scenarios and numbers are fictional training examples.
A revision without a clear total
A customer approves an exercise estimate of $420. The advisor later calls and says “we found another item for $90,” but records neither a revised total nor a clear decision. The technician completes the added work. At pickup the invoice is $510 and the customer says the call was informational, not approval.
Identify the process gap, the record that should have existed and how the manager should approach the discrepancy without inventing a prior decision.
Your evidence, decision and next step:
Compare with the model answer
The shop failed to capture a traceable decision for the revised scope and price. The communication should have identified the finding, added operation, $90 increment, $510 revised total and timing, then recorded the decision under the applicable process before releasing the work. Preserve what actually happened, pause the normal handoff and resolve the issue through the relevant policy and requirements. Do not rewrite the note as an approval that was never established.
Proposed does not mean released
An estimate contains brake work and an optional filter. The customer approves only the brakes. Both lines remain on the printed estimate, and the technician performs both because “they were on the sheet.”
Design a clearer work-release record and a pre-invoice check. Explain how declined recommendations should remain visible without becoming work instructions.
Your evidence, decision and next step:
Compare with the model answer
Give each line an explicit decision status and link the approved scope to its version and decision record. The released job instructions should distinguish approved operations from proposed, declined or deferred recommendations. Before invoicing, compare actual work with that release and investigate exceptions. Keeping a declined finding visible supports future discussion; it does not authorize performance. A useful check asks both “was this done?” and “was this within the authorized scope?”
Apply it to a job
Draft an estimate with separate diagnostic, parts, labor and adjustment lines. Write a permission log for two approved items and one declined item. Create a revision adding a fictional $140 repair to a $500 authorized scope. Reconcile a final invoice to the approved revision and write a customer handoff that distinguishes completed from deferred work.
Your evidence and decision
Concern / scenario:
Observation, measurement and reference:
Interpretation and next action:
What remains unknown / who needs to review:
Verification and handoff:
Check your understanding
Explain each item in your own words. Revisit the relevant lesson if you cannot. This self-review is not a practical-skills sign-off.
Write an estimate with clear scope and price basis.
Distinguish diagnostic permission from repair authorization.
Capture a decision for a specific estimate version.
Communicate both an increment and revised total.
Reconcile proposal, authorization, work and invoice without rewriting history.
Practice before the assessment
Free, ungraded practice. Choose an answer, then check the explanation. These are separate from the final assessment bank.
Further study
Use current vehicle and equipment information for actual service. These public resources informed subject scope and support further learning; Mechanic Roster lessons and questions are original.
