Not that long ago, there was an organization that regularly held meetings between heads and chiefs and customers and suppliers. Their aim was to make smart plans and sensible decisions. These meetings were always long and difficult, with a lot of shouting, arguments and people barely listening. Although the meetings always resulted in a plan, this plan was often insufficient and had to be adjusted. This kept on happening. Year in, year out; rinse and repeat.
Until one day, a man with a tiny wooden briefcase entered the room and told them that the suitcase contained a solution to their problems. Somewhat suspicious, they listened to his story. Because he was able to answer all their complicated questions, they allowed him to demonstrate his method.
During the next meeting with all heads, chiefs, customers and suppliers, they used the new method from the briefcase. Instead of two days and nights of arguments, they came up with a beautiful plan that everyone was happy with and contributed to after a single morning. And the organization continued to prosper for a very long time.