Electronic device history record and product release system

A method of recording data monitored during the manufacture of molded ophthalmic lenses, the method comprising the steps of:

• identifying a set of process parameters used in said manufacture;
• for each of the process parameters, identifying an associated value range;
• monitoring each of the process parameters during said manufacture;
• if, during the manufacture of one of the ophthalmic lenses, one of said process parameters moves outside the associated range, then rejecting the one of the lenses;
• and
• if, during the manufacture of one of the ophthalmic lenses, all of the process parameters stay within their associated range, then identifying said one of the lenses as acceptable, and making a device history record for said one of the lenses, said device history record including a reference code for identifying the set of process parameters
• wherein the device history records include data items, and further comprising the steps of:
• forming a shadow table;
• copying into the shadow table data items from the device history records in response to the occurrence of predetermined events,
• wherein said predetermined events include whenever anyone accesses one of the device history records to perform any of a group of predefined operations on the data items in said one of the device history records;
• placing in the shadow table a reference code identifying whenever any person accesses one of the device history records to perform a given operation on the data items in said one of the device history records identifying said person, and a reference designation identifying the given operation;
• preventing anyone not in a group of identified individuals from changing any data in the shadow table.