TSC7306G is one of the higher numbers in the same family of the manufacturer's standards as the others listed on this site, and a higher number in a corporate scheme of this kind is often associated with a later issue, either for a newer class of equipment or for a revision of an existing requirement. Whichever it is, the practical point for a supplier is the same and applies to every document of the family: the number and the edition must be recorded exactly as the customer's engineering specification states them, and the test plan must be agreed before the work begins. Manufacturers of this size maintain their standards centrally and revise them without reissuing the number, so a report that cites the number alone, without the edition, cannot be audited.