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. 2003 Apr;38(2):751–776. doi: 10.1111/1475-6773.00143
Highest (strong positive influence) rating: The team talked to many customers to understand the problem, personally experienced the problem, and had data proving severity of the problem.
Middle (minor influence) rating: The team experienced the problem firsthand and knows it well. They had no data to prove severity of the problem and did not involve customers.
Lowest (strong negative influence) rating: The team had neither experienced the problem firsthand nor talked with customers. They had no data proving problem severity.