Documented work instructions at point of use, in-process monitoring, and equipment control — 820.70 production control structure carried forward.
Risk-based production controls must be documented; monitoring and measurement criteria made explicit; defined product release authorization step required.
In-process inspection criteria and product release authorization records — production processes without defined acceptance points at each stage are frequently cited.
Maps to
QMSR / ISO 13485: §820.70 Production and process controls.
ISO 13485: §7.5.1 Control of production and service provision
Requirement text
Production and service provision shall be carried out under controlled conditions, including availability of documented information defining product characteristics, work instructions where necessary, use of suitable equipment, implementation of monitoring and measurement activities, and implementation of product release and delivery activities.
Why this clause exists
Production process controls exist because device conformance is determined at the time of manufacture — the product that leaves the production floor is the product the patient receives, and inspection after the fact can detect but not correct defects already introduced. Controlled conditions — documented work instructions at the point of use, defined sequence of operations, specified materials and equipment, and in-process monitoring and measurement activities — are the mechanism by which conformance is built into the production process rather than inspected in at the end. Work instructions must be at the point of use, not merely available in a controlled document repository, because an operator who must leave the workstation to access a procedure will not reliably consult it during production. Product release procedures define the authorized gate through which finished devices pass before distribution: without a formal release procedure, the decision about when a product is ready to ship is informal, undocumented, and not subject to the review of production records and acceptance data that the quality system is meant to require. Production records demonstrating execution per defined procedures create the evidentiary chain linking each distributed lot to the processes, materials, equipment, and personnel that produced it — the foundation for complaint investigation, field safety corrective actions, and regulatory traceability when post-market events require it.
What changed
§820.70 — Part 820 (legacy)
"Each manufacturer shall develop, conduct, control, and monitor production processes to ensure that a device conforms to its specifications. Where deviations from device specifications could occur as a result of the manufacturing process, the manufacturer shall establish and maintain process control procedures that describe any process controls necessary to ensure conformance to specifications. Where process controls are needed they shall include: (1) Documented instructions, standard operating procedures (SOP's), and methods that define and control the manner of production; (2) Monitoring and control of process parameters and component and device characteristics during production; (3) Compliance with specified reference standards or codes; (4) The approval of processes and process equipment; and (5) Criteria for workmanship which shall be expressed in documented standards or by means of identified and approved representative samples. Production and process changes. Each manufacturer shall establish and maintain procedures for changes to a specification, method, process, or procedure. Such changes shall be verified or where appropriate validated according to § 820.75, before implementation and these activities shall be documented. Changes shall be approved in accordance with § 820.40. Environmental control. Where environmental conditions could reasonably be expected to have an adverse effect on product quality, the manufacturer shall establish and maintain procedures to adequately control these environmental conditions. Environmental control system(s) shall be periodically inspected to verify that the system, including necessary equipment, is adequate and functioning properly. These activities shall be documented and reviewed. Personnel. Each manufacturer shall establish and maintain requirements for the health, cleanliness, personal practices, and clothing of personnel if contact between such personnel and product or environment could reasonably be expected to have an adverse effect on product quality. The manufacturer shall ensure that maintenance and other personnel who are required to work temporarily under special environmental conditions are appropriately trained or supervised by a trained individual. Contamination control. Each manufacturer shall establish and maintain procedures to prevent contamination of equipment or product by substances that could reasonably be expected to have an adverse effect on product quality. Buildings. Buildings shall be of suitable design and contain sufficient space to perform necessary operations, prevent mixups, and assure orderly handling. Equipment. Each manufacturer shall ensure that all equipment used in the manufacturing process meets specified requirements and is appropriately designed, constructed, placed, and installed to facilitate maintenance, adjustment, cleaning, and use. (1) Maintenance schedule. Each manufacturer shall establish and maintain schedules for the adjustment, cleaning, and other maintenance of equipment to ensure that manufacturing specifications are met. Maintenance activities, including the date and individual(s) performing the maintenance activities, shall be documented. (2) Inspection. Each manufacturer shall conduct periodic inspections in accordance with established procedures to ensure adherence to applicable equipment maintenance schedules. The inspections, including the date and individual(s) conducting the inspections, shall be documented. (3) Adjustment. Each manufacturer shall ensure that any inherent limitations or allowable tolerances are visibly posted on or near equipment requiring periodic adjustments or are readily available to personnel performing these adjustments. Manufacturing material. Where a manufacturing material could reasonably be expected to have an adverse effect on product quality, the manufacturer shall establish and maintain procedures for the use and removal of such manufacturing material to ensure that it is removed or limited to an amount that does not adversely affect the device's quality. The removal or reduction of such manufacturing material shall be documented. Automated processes. When computers or automated data processing systems are used as part of production or the quality system, the manufacturer shall validate computer software for its intended use according to an established protocol. All software changes shall be validated before approval and issuance. These validation activities and results shall be documented."
§7.5.1 — ISO 13485:2016 (current)
"Production and service provision shall be planned, carried out, monitored and controlled to ensure that product conforms to specification. As appropriate, production controls shall include but are not limited to: a) documentation of procedures and methods for the control of production (see 4.2.4); b) qualification of infrastructure; c) implementation of monitoring and measurement of process parameters and product characteristics; d) availability and use of monitoring and measuring equipment; e) implementation of defined operations for labelling and packaging; f) implementation of product release, delivery and post-delivery activities. The organization shall establish and maintain a record (see 4.2.5) for each medical device or batch of medical devices that provides traceability to the extent specified in 7.5.9 and identifies the amount manufactured and amount approved for distribution. The record shall be verified and approved."
Δ Production controls are reframed as a concise, principle-based list; adds a batch/device-level traceability record requirement identifying amounts manufactured and approved for distribution.
Common gaps (what we see in audits)
- Work Instructions Not Available at Point of Use — Work instructions exist in a document management system but are not physically or electronically accessible at the production workstation. ISO 13485 clause 7.5.1 requires work instructions to be available as necessary during production operations.
- Incomplete Equipment Maintenance Program — Production equipment maintenance is reactive rather than preventive. ISO 13485 clause 7.5.1 requires documented requirements for infrastructure maintenance activities, including defined intervals, that could affect product quality. Many Part 820-era programs lack defined maintenance schedules with documented intervals and acceptance criteria.
- Missing Monitoring and Measurement Implementation — Production procedures define what to produce but lack in-process monitoring and measurement steps. ISO 13485 clause 7.5.1 requires implementation of monitoring and measurement activities during production, not just at final inspection.
- Undefined in-process inspection points — Work instructions describe *how to build* but lack specific *inspection steps* (what to check and when). ISO 13485 §7.5.1 requires monitoring of product characteristics.
- No Defined Product Release Authorization Process — Production procedures do not clearly define who is authorized to release product at each stage, and under what conditions product can proceed to the next operation. Informal release practices without documented authorization create compliance and traceability gaps.