Which of the following statements are correct?

a) 

One of the differences between services and manufacturing is

tangibility. This means that services cannot be inventoried or carried in stock

over long periods of time.

b) 

A services blueprint is a flowchart that isolates potential

fail points in a process. There are four steps to developing a service

blueprint, namely identify processes, isolate fail points, establish a time

frame, and analyse profits.

c) 

A customer benefits package consists of both intangibles

that define the service and

tangibles that make up the service

d) 

Component reliability is defined as the propensity of a part

to fail over a given time.