I have noticed for the past few months various comments that AC service is deteriorating? The various threads on designing the perfect airline and the many comments that resulted from this exercise have been very enlightening. My questlion is how do we benchmarch AC's delivery of service and grade their performance ? We all have various expectations of service. The document being produced on the design of a top notch airline will establish user expectations. What are the next steps to ensure continuous qualtity improvement on AC,s part?