Whys: A method of root-cause analysis that entails the progressive asking of "Why?" at least five times or until the root cause is established.

With "re-entry category" targets analysis and medical record information in the "root cause analysis", the problems in medical care can be analyzed in detail.

Identify pain points, issues and gap in pre-sales data management, analyze root causes and constantly improve sales data quality by the way of monitoring, tracking and auditing.