The “Identify part or components” activity must validate the user’s diagnosis

The “Draw up an estimate” activity must inform the user about the reparation cost

The “Determine a response time” activity must inform the user about the response time

The “Define supply requirements” activity must determine the supply needs to make the reparation

The “Replace or repair the defective part” activity must provide a solution of the user’s problem

The “Check the operating status of the product” must inform the user of the status of the product