Corrective action is about identifying the cause(s) of a nonconformity and eliminate them.
Cause(s) are normally hidden and have to be investigated. So, developing a corrective action requires:
Analyzing the symptoms – collect information, facts, numbers, about the problem. For example, you can start with a problem called “Reduce customers complaints” and after this symptoms analysis you realize that you should concentrate on “broken bags” the main motive of complaints
Develop hypothesis – develop a list of potential causes behind broken bags. Select the most promising hypothesis. Find a way to test the validity of the most promising hypothesis. For example, complaints about broken bags are mostly about bags kept at the warehouse for long time
Develop a solution that will remove the confirmed hypothesis. For example, introducing First In, First Out rule at the warehouse. For example, improving production planning to avoid long stays at the warehouse.
Implement the solution and monitor its effectiveness.