We are an ISO 9001 registered job shop that has hundreds of job specific work instructions. These are updated as needed when a change is made. We also have a large amount of general work instructions that cover processes that seldom see changes. We have some that have not been revised in 10+ years. The question is when we review these seldom revised work instructions should we change the Effective Date to show that it has been reviewed? I do not see where the standard requires this and feel that if no change are made no action needs to be taken.