【考题训练第十七期】The 7 Step Improvement Process can be BEST described as?

The 7 Step Improvement Process can most accurately be described as? a) The Seven P's of Continual Service Improvement (CSI) b) A service improvement methodology based on the Deming Cycle c) A set of roles and responsibilities for managing service improvements d) A process for defining what is to be measured, gathering the data, processing the data and using it to take corrective action 答案是哪个，大家一起来分析:)