Which of the following is not a principle of lean?

Select one:

a.Specify what creates value from the customer perspective

b.Identify all steps across the whole value stream

c.Eliminate the root causes of waste by only making the actions which create value

d.Eliminate delays where possible.

e.Only to the pace of customer demand - create pull where flow is difficult

f.Strive for perfection by continually removing successive layers of waste