5X5X5: Design and constraints

Book [The Innovator's Hypothesis: How Cheap Experiments Are Worth More than Good Ideas] mentioned, like [设计冲刺：谷歌风投如何5天完成产品迭代(Sprint: How to Solve Big Problems and Test New Ideas in Just 5 Days)].
The 5X5X5 design is simple and straightforward. A minimum of 5 teams of 5 people are given no more than 5 days to come up with a portfolio of 5 ‘business experiments’ that should take no longer than 5 weeks to run and cost no more than 5000 euro to conduct. Each experiment should have a ‘business case’ attached explaining how running that experiment gives tremendous insight into a possible 5 million euro savings or 5 million euro growth opportunity for the firm.
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