General overview of how to implement it

1. Assign each member a fictitious sum of 100 euros.  Assume that each participant has 100 euros to spend on the ideas.  They may spend the money anyway they like; by allocating the entire budget to one or a few very valuable ideas, or by dividing the amount into smaller chunks and allocating it to multiple interesting ideas (that have the potential to turn into cash cows).
   Distribute a piece of paper to each participant and encourage them to brainstorm ways to spend their 100 euros.
   If you want to spice up your evaluation phase, you can utilize fictitious money (for example, ‘Monopoly money’).  However, exercise caution.  Do this only if the subject of your brainstorm fits this method (you do not want to merrily wave bills if your subject is reorganization or other unpleasant cutbacks).  Additionally, check to see whether the participants are up for it (for some, utilizing ‘fake bank notes’ may be too much out of their comfort zone; some may even become offended due to its perceived immature nature).
2. Request that each member “spend” their 100 euros on their preferred ideas.  The funds can be spent completely at once or spread out among multiple concepts in tiny increments.  Additionally, you can request that participants explain (verbally or in writing) why they spent their hundred in the way they did (It can be instructive to understand why someone’s concept was’invested’ in).  Often, people have very different motivations than you may assume.
   Additionally, by providing the rationale for someone’s ‘vote,’ he or she is forced to consider arguments, which might result in fresh discoveries and benefits.)
3. Create a ‘longlist’ of all the concepts.  Collect all of the concepts in which you have invested. Make a list of them on a flip chart or a whiteboard.  Separate the investments (Euros) from the ideas in a second column.  In a third column, include (if available) the investors’ justifications for the investment.
4. Create a prioritized list of the most useful concepts to develop further.  Discuss which ideas are the most valuable and intriguing to pursue further inside the group.  Do you struggle to define a top 3-8?  Then perhaps your ‘longlist’ is very lengthy.  Then simply restart by’spending’ another 100 euros on the list’s suggestions.  This time, though, participants may spend their 100 in any combination of 1x 50 and 2x 25.

Apart from being an individual activity, The Hundred Euro Test can also be done in a group setting.  Simply allow the group to determine how the Hundred Dollars will be spent.  This will almost certainly result in a shorter shortlist of ideas (than the one developed by individuals), but it will also necessitate the formation of a team that is completely capable of cooperating.