Scope must be defined before price can be trusted.
Scope is not what someone assumes. Scope is what can be described, measured, accepted, priced, changed, and enforced.
Descriptive Scope
A general textual description of work without measurable boundaries, quantities, or completion criteria.
- General intent of the parties.
- Nature and type of work.
- Scope quantity or extent.
- Acceptance, completion, or performance criteria.
- Basis for pricing, valuation, or change orders.
- Small-scale or informal work.
- Early project or pre-design stages.
- Projects with high uncertainty or evolving scope.
Open to interpretation
Lack of measurable boundaries leaves scope open to interpretation.
Performs work beyond expectations without clear entitlement to extra payment.
Bears risk of scope expansion and uncompensated work.
No objective basis to verify completion or enforce performance.
Contract interpretation · Statutory adjudication · Court
Status: in force. Sources: provincial contract law and CanLII descriptive scope jurisprudence.
Measured Scope
Scope defined by quantities, units, dimensions, areas, counts, locations, specifications, or measurable work items.
- Quantity and extent of work.
- Basis for unit pricing and valuation.
- Measurement-based change orders.
- Final outcome quality unless acceptance criteria are defined.
- Performance responsibility beyond measured units.
- Design adequacy or suitability of selected method.
- Trade packages.
- Estimating and tendering.
- Unit-rate work and quantity-driven projects.
Measurement does not guarantee outcome
Measured scope controls quantity, but may not control result, quality, coordination, or completion standard.
Can justify payment by measurable output, but may still face quality or acceptance disputes.
Can price and control quantity better, but must define acceptance to protect margin.
Can verify quantities, but still needs quality, completion, and acceptance standards.
Measured scope answers “how much,” not always “what result.”
Use measured scope when quantity matters, but add acceptance criteria to control outcome.
Result-Based Scope
Scope defined by the required final result, performance standard, completion criteria, or acceptance outcome.
- Required final outcome.
- Completion and acceptance criteria.
- Performance expectations and deliverables.
- Exact method of execution unless specified.
- Detailed quantities unless measured scope is added.
- Internal labour or productivity assumptions.
- Performance-based work.
- Design-build or outcome-driven agreements.
- Projects where acceptance is more important than quantity alone.
Result may be clear, method may not be
Result-based scope can reduce acceptance disputes, but may create execution-method or cost-risk disputes.
May be judged by outcome, even where time, materials, or dependency conditions are unclear.
Can sell certainty, but must price delivery risk and define exclusions.
Gets a clearer acceptance basis, but must understand that certainty usually has a price.
Result-based scope controls acceptance.
It is strong when the desired outcome is defined clearly and risk allocation matches the promised result.
Hybrid Scope
A combined scope structure that defines description, measurable boundaries, result expectations, exclusions, acceptance criteria, and change rules.
- Nature and type of work.
- Quantities, limits, inclusions, and exclusions.
- Acceptance criteria and change mechanisms.
- Unexpected conditions unless allocated.
- Market volatility unless contract mechanism exists.
- Client changes unless documented and priced.
- Professional construction contracts.
- Projects with pricing, risk, and acceptance sensitivity.
- Work requiring both quantity control and outcome control.
Requires discipline
Hybrid scope is stronger, but only works if changes, exclusions, acceptance, and dependencies are maintained during the project.
Clearer task boundaries, stronger basis for extra work claims, and less ambiguity.
Better margin protection, change control, and reduced dispute exposure.
Clearer verification, acceptance, cost control, and enforcement basis.
Hybrid scope is the strongest practical model.
It combines description, measurement, outcome, acceptance, exclusions, and change rules into one enforceable structure.
