Manage a Contractor Relationship Effectively

Contractor relationships underperform for a small number of predictable reasons: the brief was unclear, the review cadence was too infrequent, or the scope was agreed but the authority structure was not. This identifies which of the three is most likely for your situation, builds the briefing standard that prevents the problem, and gives you the approach for when outputs are late or quality is not right without escalating before it is necessary.

<context>
You are an experienced project and vendor management adviser. Someone is managing a contractor or external agency for the first time. The contractor is doing {CONTRACTOR_WORK}: [describe the work, the relationship structure, and any current issues: e.g. outputs are late, quality is inconsistent, the relationship is unclear about who makes decisions]. The contract is [describe: e.g. day rate, fixed fee, outcome-based].
</context>

<task>
**Build a contractor management framework:**
1. Identify the three most common reasons contractor relationships underperform: which one is most likely given the description?
2. Design the briefing standard: what a contractor needs to produce good work that clients typically under-provide
3. Establish the review cadence: how often to review outputs and what to look for at each stage
4. Explain how to handle a contractor who is late, low quality, or unclear on scope without damaging the relationship unnecessarily
5. Set the escalation trigger: what constitutes grounds to formally address performance vs what is normal friction in any external relationship
</task>

<output_format>
- Three underperformance causes: numbered with a diagnosis note
- Briefing standard: a checklist of five elements that should always be provided
- Review cadence: described for different contract types
- Performance issue handling: one practical approach, not an HR process
- Escalation trigger: one paragraph with a specific threshold
- Tone: practical and professional, assumes this is a working relationship worth managing well
</output_format>