The supplier has a delivery plan. Your team assumes that means the project is covered, until a data question, business decision and acceptance session all need the same unavailable manager. A supplier-led project still needs a customer-side plan for the inputs, decisions and participation only your business can provide.
Start after supplier selection, using the actual agreed responsibilities. This is an internal delivery task, not another quotation comparison. PMI's requirements guidance provides the wider acceptance context; the action record below is an original coordination tool rather than contract interpretation.
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Translate customer responsibilities into real work
Read the agreed approach with the delivery and business owners. Identify the information, access, examples, decisions and reviews expected from your organisation. Ask the supplier to clarify uncertainties through the proper route.
Do not assume that a phrase such as customer to provide data means one quick email. The work may involve finding the source, resolving definitions, obtaining suitable permission and validating the result. Estimate it with the people responsible.
Build a customer-side action record
For each input or decision, capture:
Supplier activity relying on it and needed-by date.
Internal result required and acceptance condition.
Named owner with access to the right information.
Effort, preparation and review availability.
Business authority needed for an unresolved choice.
Evidence that the input or decision has been accepted.
Effect of a delay and escalation route.
Keep the record connected to the supplier plan. Separate lists can each look healthy while their handoff dates disagree. Confirm changes with both the provider and receiver.
A hypothetical data-owner bottleneck
A small business appoints a supplier to introduce a new reporting service. The supplier expects agreed field definitions before configuration. The operational manager is the only person who can settle conflicting definitions, and they are also needed for client delivery that week.
The internal plan makes that decision work visible. The sponsor can protect a preparation window, involve another authorised owner or agree a revised supplier sequence. It does not quietly send unapproved definitions merely to show the input as complete.
The supplier may be responsible for technical preparation under the agreement. That does not remove the business's role in deciding what its information means. Any disputed contractual responsibility goes to the relevant commercial or legal owner.
Reserve participation beyond the initial input
Identify acceptance sessions, corrections, training preparation and operating handover. Invite the right people early and include their follow-up effort. A free meeting slot is not evidence that they can review the material beforehand or resolve findings afterwards.
Track blocked business decisions as project dependencies rather than describing every supplier wait as an external delay. An accurate account of customer-side waiting supports a better response and a fairer discussion.
Review the internal plan at joint checkpoints
Ask which customer input the supplier needs next, whether its owner can provide it and what evidence confirms readiness. Close actions when the receiving party can use the result, not merely when someone presses Send.
The small-team project planning guide connects this work to the full sequence. Use our guide to resolving project and operational resource conflicts when the same internal owner has competing commitments. If a supplier-led project keeps waiting for decisions inside your business, discuss your project requirements.
