A supplier misses a readiness milestone
A supplier was due to send a confirmed stage and technical plan last Friday, and nothing has arrived.
The short answer
Separate what you know from what you assume: ask the supplier for a dated reply, check the contract milestone wording with the competent party, and decide the fallback while the answer is still open.
The decision belongs to the person who signed off the supplier, not the person who noticed the delay. Use the supplier quote normaliser if you need a like-for-like comparison of a backup quotation.
What is known and what is not
| Known | Not yet known |
|---|---|
| The agreed plan lists Friday as the date for a confirmed technical plan from the audio-visual supplier. | Whether the supplier received the latest programme, or is waiting on something from the organiser. |
| Two reminder messages have gone unanswered over three working days. | Whether the supplier is delayed, unwell, short-staffed or no longer able to deliver the scope. |
| The conference is in three weeks and the venue load-in time is fixed. | What the supplier's contract says about milestones, delay and termination. That is a question for the competent party. |
| A second supplier quoted earlier at a higher price. | Whether that supplier is available on the dates and whether its quote covers the same scope. |
Who has authority to decide
The person who approved the supplier, usually the programme owner or event chair, decides whether to wait, escalate or replace. The treasurer approves any change in cost. Contract wording, notice and termination are questions for your lawyer or the person who reviews contracts, never for the project team to conclude.
Write the decision, the person and the deadline in the decision log so the next message to the supplier is one voice.
The realistic options
| Option | What it involves | Consequence to weigh |
|---|---|---|
| Escalate and agree a new dated milestone | Phone the supplier's senior contact, ask for a reason and a written new date. | Keeps the relationship and the price. Leaves risk if the new date is also missed. |
| Agree a reduced scope | Ask the supplier which parts of the technical plan can be confirmed now and which wait. | May reduce the programme, for example fewer breakout rooms. Needs a change request and approval. |
| Prepare a backup supplier in parallel | Ask the second supplier to confirm availability and updated scope. | Costs time and may have a deposit. Does not by itself end the first contract. |
| Postpone or scale down the event element | Move the affected session or drop the element until the plan is confirmed. | Affects speakers and delegates. Weigh it against the other options. |
Communications: who says what to whom
Write to the supplier plainly: what was due, that it has not arrived, what you need and by when. Copy the person who approved the supplier. Tell the venue only if the load-in plan may change.
Tell the committee the facts and the decision date. Do not tell speakers or delegates anything until a decision exists.
- Short message template: We have not yet received the confirmed technical plan that was due on [date]. Please reply by [date and time] with the plan or a written new date and the reason for the delay. Please also tell us which parts of the scope are at risk.
Follow-up and preventing a repeat
- Record what happened and the dates in the status report.
- Set milestones with a named supplier contact and a written receipt confirmation next time.
- Ask finance whether any deposit or payment is linked to the missed milestone.
- Review the contract with the competent party after the event for milestone and delay wording.
Worked example · Fictional example
Persatuan Fiktif Perubatan Pergigian: audio-visual plan three weeks late
Fictional organisation and figures, written to show the level of detail that is useful.
A fictional dental association's audio-visual supplier misses the Friday milestone for a technical plan, three weeks before a two-day conference. The secretariat writes with a reply-by time, copies the conference owner and asks a second supplier for availability.
The supplier replies two days later: part of the plan will be sent in four days and the rest after a site visit. The chair approves a reduced breakout set-up pending the full plan, a change request is raised and the treasurer notes that the backup quote is held but not accepted. Contract questions go to the association's adviser.
Use this yourself
Missed milestone response checklist
Work through in order and write the owner and date against each line.
- Milestone, agreed date and the document that records it:
- Messages sent so far, with dates and replies:
- Reply-by time given to the supplier:
- Person who approved the supplier and decides the next step:
- Contract question for the competent party (milestone, delay, notice):
- Fallback options: reduced scope, backup supplier, postpone element:
- Backup supplier availability and like-for-like quotation:
- Cost effect and approval owner:
- Message to committee and date of next update:
Handle it in-house, or bring in help?
Your team can usually handle this when
- The delay is short and the supplier has replied with a credible written date.
- The scope is small and a replacement is easy to find.
- One person owns both the supplier and the budget.
Outside planning help earns its fee when
- The supplier is silent and the event date is close.
- The contract is unclear and nobody has read it.
- Several workstreams, such as stage, streaming and catering, depend on the same plan.
Need the knock-on decisions mapped?
A planning diagnostic can trace which tasks depend on the missing milestone and set out the decisions, owners and dates for each fallback. A conference project lead can then coordinate the agreed communication and replacement quotation steps for a set period. Contract and termination questions stay with your own adviser.
Questions organisers ask
How long should we wait before escalating?
Escalate once a reasonable reply window has passed without an answer, and set a specific reply-by time in writing. The right window depends on how close the event is.
Can we simply replace the supplier?
That depends on the contract and on the other supplier's availability. Ask your adviser about notice and any deposit before telling the first supplier anything final.
Should delegates be told about the delay?
Only if the programme will change. Tell them what changes and when, not the supplier's name or the reason.
Related resources
- Professional association conference: the rehearsal reveals an unresolved handover
- Professional association conference: last-minute additions exceed the agreed scope
- Professional association conference: the invoices differ from approved quotations
- Event change request builder
- Event weekly status report builder
Content record: Draft. Written from the cited sources and checked by automated rules; not yet independently reviewed.