Product stock should be planned from expected participation and production capacity, not total event attendance alone. Bringing one item for every guest can create unnecessary stock. Bringing exactly the predicted number creates no room for testing, damage or higher-than-expected demand.

A simple planning model helps.

Estimate Expected Participation

Use:

attendance × participation rate

If 300 guests attend and the activation expects 40% participation, the planning demand is 120 items.

That percentage should be tested against the event type and whether customisation is optional, guaranteed or invitation-only.

Check Artist Capacity

If the artists can complete only 90 items during the event, bringing 150 units does not solve the bottleneck.

Stock and artist capacity need to match.

Add Operational Buffer

Buffer stock can cover:

  • pre-event material tests;
  • damaged or unsuitable units;
  • artist errors;
  • guest changes;
  • unexpected demand;
  • VIP reserve;
  • samples for photography.

The appropriate buffer depends on product value and replacement availability.

Apparel Needs Size Planning

For T-shirts, jackets or footwear, total stock is only part of the problem.

You also need a size distribution.

Useful inputs include:

  • attendee profile;
  • RSVP size collection;
  • historic brand data;
  • unisex versus fitted products;
  • VIP pre-selection.

A surplus of one size does not help if the requested size is gone.

Separate Display and Production Stock

Items used for:

  • display;
  • press;
  • artist testing;
  • photography;
  • sample menu;

should not automatically be counted as guest stock.

Label them clearly.

High-Value Products Need Tighter Control

For luxury or expensive products, stock may be issued only after guest confirmation.

Use:

  • named trays;
  • order numbers;
  • secure storage;
  • controlled handover.

The operating model should reflect product value.

Decide What Happens to Unused Stock

Before the event, agree whether unused items:

  • return to retail stock;
  • move to another activation;
  • are customised later;
  • are retained by the client;
  • require special handling.

This affects how much surplus is acceptable.

Plan Variants as Separate Stock Pools

If the activation offers sizes, colours or product variants, treat each as its own inventory risk.

A total of 200 items does not help if the popular shoe size or preferred bag colour is gone. Where possible, use RSVP data, product history or a deliberately limited variant menu. Keep a small flexible reserve for late VIPs and damaged stock. The artist capacity and the product mix need to be planned together, especially when one variant takes longer to customise than another.

Plan Product Stock With the Activation

Share attendance, participation assumptions, artist capacity, product variants, sizes and value. Impact Murals can help align the customisation plan with the number of products the event can realistically process.