or document control, refers to the over-all system of an
organization or company for accessing, reviewing, revising,
approving, disposition, and obsoletion of documents, data, and software.
Document control plays such a major role in defining the quality
standard and systems of a company that the ISO9000 standard devotes one
whole section or element to it.
Good document and datasheet control is critical to semiconductor
manufacturing given the complex processes involved in its day-to-day
operations. Semiconductor companies are expected to have hundreds,
if not thousands, of documents since they all follow the same adage:
"Document what you practice and practice what you document."
Accessibility of Documents and Data
Accessibility of documents and data pertains to the company's system for
retrieval of controlled documents and data. Its foundation is the
Document Reference Index , which is simply a master list of all
company documents. Each document in this master list must bear a unique
control or index number and revision level. The document reference index
must be accessible to all company personnel and must show the most
current revision of each controlled document or data sheet of the
All of the
company's controlled and documents must be organized in a structure that
allows easy access to information. Documents with related
information must include trails and links to each other.
Furthermore, all controlled documents and data sheets must be formatted
in a standard way, with the format designed to make it readable,
informative, and easy to use.
documents may be in the form of a hard copy, a computer file, or other
media but they should always be accessible to personnel while ensuring
proper control, i.e., only the latest revision must be accessible.
Obsolete documents must be removed from the system to prevent their
accidental use. Obsolete documents that need to be retained for
reference should be retained as quality records and identified as such.
Revision, Approval, Disposition of Documents and Data Sheets
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Every new or
revised controlled document or data sheet must undergo a standard and
systematized review and approval process by authorized personnel who are
considered experts on and/or responsible for the subject matter of the
document. These reviewers and approvers must have access to
supporting reference material if necessary.
documents must include descriptions of all previous changes to the
document in a continuous trail. A change notice must be issued to
affected parties every time a document is revised, if necessary.
documents must be immediately disposed of.
ISO 9000 does
not require that periodic review of documents be done , but it is
considered good practice to implement this as part of the company's
document control. This means that document owners will be required
to review their documents at specific intervals whether or not they see
any need to change them.
In this day
and age of modern computers, companies can very well afford to have a
computerized document control system that meets all of the above
requirements and more.
Monitors and Controls;
The ISO9000 Standard;
Metrology and Calibration
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