Is a work instruction mandatory - CNC machine

[blue moon]

Does work instruction is mandatory

where i visit a factory for manfacturing of Mold and casting and spare parts as a consultant for ISO 9001

they have CNC machine they get the smaple from the customer and make the same


they factory manager didn't make any work instruction for
the machine and the QC inspection and how to set up the machine


because he said that the operator is qualified and aware about their machine and operation of machine and didn't need work instruction for this


is this possible ? i am afraid that auditor will be make a non confirm for this

[Jennifer Kirley]

I worked in a job shop that did not have work instructions for setting up the CNC machines. We instead had job travelers that listed the manufacturing steps and requirements of the part, such as tolerances.

The tolerances are the most important part: there should be some type of instruction for communicating the conditions: size, etc, for critical quality aspects of the part. Do they have something of this kind?

[blue moon]

they only do this :

1- the designer make the design and determine the tollarance and then send the design to the operator to start

and the operator setting the machine as design and as his experience

[Jennifer Kirley]

How is the tolerance determined?

If the operator is working off of a drawing, whether supplied by the customer or not, this could suffice as work instructions as long as the manufacturer can show the results are consistently satisfactory.

Does the end customer have other requirements? You said this was an ISO 9001 operation; standard specific requirements are minimal, but customer requirements are still important. An outside auditor will likely ask where the quality requirements originate.

[blue moon]

there are not customer requirement

the customer offer the sample to make the same of it

and the factory make a sample and send it to customer

or if the customer is didn't require a sample only sign on the design for approve

then the designer upon his experience with material determine the tollarance

=======================

i will a traveller job order with the quantity and the specification determine by the company and attached with the design

so the operator will get the job order and the design

and record the measurements and any other notice in the traveller job order

thanks

[brahmaiah - 2010]

In Reply to Parent Post by tech4arab

they only do this :

1- the designer make the design and determine the tollarance and then send the design to the operator to start

and the operator setting the machine as design and as his experience

If a document which mentions all product requirements is available with the operator and the operator is experianced then the work instruction is not mandatory.
V.J.Brahmaiah

[SpongeMouse]

In Reply to Parent Post by tech4arab

Does work instruction is mandatory

where i visit a factory for manfacturing of Mold and casting and spare parts as a consultant for ISO 9001

they have CNC machine they get the smaple from the customer and make the same


they factory manager didn't make any work instruction for
the machine and the QC inspection and how to set up the machine


because he said that the operator is qualified and aware about their machine and operation of machine and didn't need work instruction for this


is this possible ? i am afraid that auditor will be make a non confirm for this

the work instruction should be approach in general term, not on the basis of specific adjustment for the particular item.

just have a work instruction on how the operation starts until it finishes (same as with the inspection). dont complicate the work instruction.

it just telling you what you do, not on what are you doing on every item.

assuming that the operator is indeed have experience, if i am the auditor, i will ask, "what if the operator is not available? how will another person operate the machine?"

those simple questions will surely sets the team with observation or NC.

[BradM]

I would approach this as a three-person team: The customer, the consultant, and the auditor. All have very similar goals: to develop the Quality Management System (QMS) for producing good product efficiently and profitability.

The questions may flow as follows: Is a procedure necessary? Do they have inconsistencies that matter when operating/ setting up the equipment? What is the risk of putting in a wrong setup parameter? Would the process be better off having some things standardized in a procedure, or would it just weigh the system down?

Some of the others who operate CNC equipment are a better judge of this. But I do know that depending on the age of the equipment, the operating system, and the experience of the operator, equipment can range from extremely simple to quite involved for setup.

If the consultant can help guide the customer through these thought-processes, then the customer will know if they need something else or not. I guess I would encourage devoting time to really looking at the process, and allowing the process to gauge what is necessary.