Some of the most frequent misconceptions and misgivings of lean manufacturing are:
Lean manufacturing should give results as soon as it is implemented.
It is confined to an internal implementation in an organization and should not be extended to suppliers.
Leads to retrenchment of personnel as the very idea of going lean is to streamline the processes and remove waste from the system.
How it functions is the not the responsibility of the employees of an organization but only of those few who are implementing lean manufacturing in the organization.
It can function only on the shop floor and cannot be applied to the other activities of an organization.
If one technique is successful in implementing lean in one organization, it has to be successful; in another organization as well.
It provides solutions to all the problems.