"The photograph is taken, but when do I get the result?"… A participatory programme ends with receipt, not input

Custom-making experiences that take audience data and provide personalized results are now considered essential headline attractions at pop-up stores and fairs. Successful examples include Shin Ramyun Bunsik The Factory, which puts visitors’ chosen ingredients and photographs onto custom packaging, and Germany’s Genius Loci Weimar light festival, where visitors use laser pointers to take part in light projection and vote for an audience award.

Yet from the perspective of veteran lead planners with more than ten years’ experience on site, the greatest blind spot in such complex participatory programmes is the planning team’s mistaken belief that the experience ends when visitors enter their data.

A truly complete on-site experience happens not at kiosk input, but at the moment of Delivery when visitors hold the final result or see it with their own eyes.

1. Back-end bottlenecks caused by unequal Throughput between processes

A programme such as Shin Ramyun Bunsik The Factory, where visitors choose noodles, soup seasoning and toppings and take a photograph to make their own package, inevitably involves a series of physical processes.

• The reversal in processing speeds: the Input stage of choosing ingredients and taking a photograph at a kiosk is relatively fast because visitors do it themselves. By contrast, the Output stage of producing the image, printing it onto a packet and sealing the packaging takes substantially longer because it involves both the machine’s physical limits and staff’s manual work.
• Control the physical queue: admitting visitors continuously at the input rate eventually creates a Bottleneck in front of the printing and packaging desk, tangling the queues. Planners must control arrivals by working backwards to the appropriate admission capacity and dwell time per session from the daily Max Capacity of the slowest process, usually printing and packaging.

2. Segment Involvement: "Not everyone wants to control the stage"

Weimar’s light festival successfully separated the routes of visitors actively participating in laser mapping from those who only voted after viewing.

• Recognize the participation spectrum: forcing every visitor into 100% active behaviour, such as being photographed, operating a device or going on stage, instead reduces participation and worsens route congestion.
• Design Bypass and indirect-participation routes: maintain on-site Fluidity by separately providing indirect-participation routes for visitors uncomfortable with direct operation, whether simply voting for an audience award by smartphone or viewing others’ results and moving to the next zone.

3. Exception Handling: "How will you send visitors away when the machine stops?"

The most complete rehearsal assumes that the system has stopped. Network failures, machine malfunctions and shortages of printing paper will inevitably leave visitors unable to receive their results on site.

• A Rule-set for compensation and later delivery: when an error occurs, will visitors be made to wait indefinitely, or will they receive immediate compensation with an alternative, such as merchandise or a mobile gift voucher, and then leave? If the result will be posted to their homes after recovery, who pays for delivery and who holds their personal information? These exception-handling (Fail-over) scenarios must be agreed in writing in the rental supplier’s scope of work.

4. A four-stage acceptance checklist for personalized Custom experiences

The planning team must follow this four-stage working protocol when checking the system with the production agency.

A planner’s note: "Checking only that input arrives is half a rehearsal"

Visitors are not satisfied by a pop-up message on a monitor saying that their photograph has been sent to the server. Only when the custom result is in their hands or appears in full on a giant screen do they feel that the experience is complete.

Do not take reassurance from the hardware specifications in the plan alone. On system-rehearsal day, planners must stand not on the spectacular stage, but at the final desk tucked furthest into the corner—the Delivery Point where visitors receive the finished result—and start a stopwatch. The time that passes there determines the service impression of the entire event.