ISO Certification

This article identifies the requirements for purchasing controls and supplier qualification procedures, as well as best practices for implementation.

Purchasing Controls

Sourcing suppliers in the medical device industry is not as simple as going on the internet and finding your material and purchasing it. As part of a compliant quality management system, purchasing controls must be in place to ensure that quality products and materials are going into your device and that any service providers that your company uses in the production of your product or within your quality management system are qualified.

ISO 13485 Requirements

In light of that, ISO 13485:2016 sections 7.4.1 Purchasing process, 7.4.2 Purchasing information, and section 7.4.3 Verification of purchased product outline the purchasing controls for medical device manufacturers. The following are requirements for the evaluation and selection of suppliers:

• The organization must have established criteria for the evaluation and selection of suppliers.
• The criteria need to evaluate the supplier’s ability to provide a product that meets the requirements.
• It needs to take into consideration the performance of the supplier.
• It must consider the criticality and the effect that the purchased product may have on the quality of the medical device.
• The level of supplier assessment and monitoring should be proportionate to the level of risk associated with the medical device.

Maintaining Purchasing Controls

To start, in the most basic sense, purchasing controls involve procedures that ensure you are only purchasing from suppliers who can meet your specifications and requirements. The best way to keep track of your qualified suppliers is to maintain an Approved Supplier List (ASL). You should only purchase products or services that affect your product or quality management system from companies on the ASL (you would not necessarily need to qualify things like office supplies or legal assistance through purchasing controls).

When used effectively, the Approved Supplier List can be a great tool to manage the key facets of purchasing control and keep track of supplier monitoring. Items that you can capture on the ASL include:

• Supplier Name
• Scope of Approved Supplies
• Contact Information
• Status of Approval (Approved, Pending, Unapproved, etc.)
• Qualification Criteria
• Supplier Certification and expiry dates
• Monitoring Requirements/Activities
  • Date of Last Review
  • Date of Next Review

The first step in your purchasing procedure should involve checking to see if the supplier is under active approved status on the ASL. The second step will be to ensure that you are purchasing an item/service that is within the scope of approval of that supplier. If you have not approved the supplier, or the intended purchase is beyond the scope of that supplier, your purchaser will need to go through the necessary channels to add the supplier to the ASL or modify their scope on the ASL.

Supplier Qualification Criteria

As required by the FDA, the level of supplier assessment should be proportionate to the level of risk associated with the medical device. The FDA is not prescriptive about the use of specific qualifications or assessments for different types of suppliers, so that is up to your company to determine. This is a somewhat grey area but based on years working with companies and suppliers, as well as participating in FDA and ISO 13485 audits, there are some general expectations of vendor qualifications that we have observed and would recommend.

It is good practice to have a form or template that guides your supplier evaluation process. Using input from engineering and QA to first determine the level of risk and the requirements of that supplier, and then base your qualification plan on that information. If you have a higher risk supplier who may be supplying a critical component to your device, or providing a critical service such as sterilization, then your qualification process will be much more involved.

Here is an example of two different levels of criteria based on the type of supplier (the intent is not for the following items to be rules, and your company is responsible for determining the adequate acceptance criteria for suppliers, but this is a general example of what you may expect).

• Critical Custom Component Supplier
  • ISO 13485 Certification
  • On-site audit of supplier’s facility
  • References
  • Provides Certificates of Analysis (CoA)
  • A written agreement that the supplier will communicate with the company regarding any changes that could affect their ability to meet requirements and specifications.
  • You validate a production sample, and it meets requirements
• Non-Critical Consumable Supplier
  • Product available that meets the needs of the company.
  • An associate has previously used by an associate who recommends the supplier.
  • Adequate customer service returns allowed.

Additional Function of Supplier Evaluation Forms

The supplier evaluation form can also be used as the plan to assign responsibility and track completion and results during the initial evaluation. It can also include the plan for ongoing monitoring and control of the supplier. This evaluation form should be maintained as a quality record, and auditors will frequently ask to see supplier evaluations.

Are Supplier Audits Required as Purchasing Controls?

Also valuable, supplier audits may be included as part of an evaluation plan for a new supplier, the change of scope of a supplier, a routine audit as part of ongoing monitoring, or as part of a nonconformity investigation of a high-risk product. While it is not required by ISO 13485, nor does the FDA does specify in the CFR that you must audit suppliers, it is a very good idea to audit your critical suppliers. If an auditor or FDA inspector sees evidence that your current purchasing controls are inadequate, performing supplier audits may be forced as a corrective action.

Beyond that, you can gain so much value, and gather countless clues and important information in an audit that you just cannot get without visiting your critical supplier. You can see where they plan to/are making/cleaning/sterilizing/storing your product. Talk to the people on the line, are they competent and trained? Does the company maintain their facility well? How secure is it? Do they maintain adequate records and traceability? Have there been any nonconformities relating to your product that have been detected? Etc.

Supplier audits should also include evaluation of the procedures, activities, and records of the supplier that could have an impact on the product or service they are providing your company. If it is not the first audit of the company, you should be sure to review the previous audit report findings and ensure the company has addressed any nonconformities, review supplier performance data, information about any changes that may have occurred at the supplier since your last visit, etc.

Record Maintenance and Ongoing Evaluation of Suppliers

No matter the method of supplier qualification, it is best practice to maintain supplier files that contain useful information relative to the supplier that may include:

• The original supplier qualification form
• Supplier certificates
• References
• Audit reports
• Subsequent performance evaluations
• Expanded scope qualifications
• Supplier communications
• Current contact information
• Copies of any non-conforming material reports related to the supplier, etc.

ISO 13485 requires monitoring and re-evaluation of suppliers, and maintaining detailed supplier files will assist in meeting this requirement, and will help in the feedback system to identify and recurring problems or issues with a supplier. On a planned basis, whether that is annually, or every order (dependent on the criticality of the product), your company should conduct a formal supplier evaluation to determine whether the supplier has continued to meet requirements – In general, annual supplier reviews are standard. Additionally, you must specify this frequency in your procedure (auditors will look for what period you specify in your procedure, and then will check your ASL to make sure all of your suppliers have been reviewed within that timeframe).

During the supplier evaluation, if you find there have been issues, you need to determine and weigh the risks associated with staying with that supplier, and document that in the supplier file. If you determine the supplier should no longer be qualified, then you must also indicate on the ASL that the company no longer approves of the supplier.

Making the Purchase

When you have verified your supplier is approved on the ASL, you are authorized to purchase a product. Engineering is usually responsible for identifying the product specifications, requirements for product acceptance, and adequacy of specified purchasing requirements before communication to the supplier. The specifications may be in the form of drawings or written specifications. Additional information communicated to the supplier should also include, as applicable, an agreement between your company and the supplier that the supplier will notify you before the implementation of changes relating to the product that could affect its ability to meet specified purchasing requirements. When the first batch of product is received from a particular supplier, it is a good idea to verify that the product performs as intended before entering into production with new material or components.

Supplier Nonconformity

From time to time, you may encounter issues with a supplier. Sources of nonconformity include incoming inspections, production nonconformities, final inspection, or customer complaints. You must notify your supplier of the nonconformity and record their response and assessment. Depending on the level of criticality of the vendor, it is reasonable to require them to perform a root cause analysis to determine and alleviate the cause of failure. You should also request documentation of an effectiveness check to ensure the supplier has taken corrective actions. You should maintain copies of supplier nonconformity reports in the supplier file, and discuss nonconformities during ongoing supplier evaluations.

If the supplier does not cooperate or fails to address the nonconformity in an acceptable manner, or if there is a pattern of nonconformities with the vendor, then you should disqualify the supplier, and indicate that the supplier is “not approved” on the ASL.

Purchasing Controls Procedures You Might Need

Medical Device Academy developed a Supplier Qualification Procedure, Purchasing Procedure, and associated forms that will meet purchasing controls regulatory requirements for ISO 13485:2016 and 21 CFR 820.50. These procedures will help you ensure that goods and services purchased by your company meet your requirements and specifications. If you have any questions or would like help in developing a custom procedure or work instructions that meet your company’s unique needs, please feel free to email me or schedule a call to discuss.

The article shares lessons learned from implementing procedures for a new ISO 13485 quality system. This is the second in a series. The first month of procedure implementation was covered in a previous article titled, “How to implement a new ISO 13485 quality system plan in 2016.”

Typically, I recommend implementing a new ISO 13485 quality system over six months. Still, recently I a few clients have requested my assistance with implementing a quality management system within four months. In November, I wrote an article about implementing a new ISO 13485 quality system. That article described implementing procedures for the first month. Specifically, the implementation of the following procedures was covered:

1. SYS-027, Purchasing
2. SYS-001, Document Control
3. SYS-002, Record & Data Control
4. SYS-004, Training & Competency
5. SYS-011, Supplier Quality Management
6. SYS-008, Product Development
7. SYS-010, Risk Management
8. SYS-006, Change Control

These eight procedures are typically needed first. This article covers the implementation of the next set of procedures. During this month, I recommend conducting company-wide quality management system training for the ISO 13485 and 21 CFR 820.

Implementing Receiving Inspection Procedures

During the first month, procedures for purchasing components and services are implemented. As these products are shipped and received by your company, you need to create records of incoming inspection. It is not sufficient to merely have a log for receiving inspection. You need records of the results of the inspection. You may outsource the inspection activities, but receiving personnel must review the records of inspection for accuracy and completeness before moving product to your storage warehouse or production areas. Even if the inspection is 100% outsourced, it is still recommended to verify the inspection results independently on a sampling basis periodically. This should be a risk-based sampling that takes into account the importance of the item being inspected and the existence of in-process and final inspection activities that will identify potential nonconformities.

The most challenging part of this process typically is identifying inspection procedures and calibrated devices for inspection. Your company must find a balance between inspections performed by suppliers, incoming inspection, in-process inspection, and final inspection. Each of these process controls requires time and resources, but implementation should be risk-based and take into account the effectiveness of each inspection process–as determined by process validation. Sample sizes for inspection should also be risk-based.

Implementing Procedures for Identification and Traceability

The lot or a serial number of components must be identified throughout product realization–including incoming inspection, storage, production, final inspection, and shipping. In addition to determining what things are, you must also identify the status of each item throughout the product realization process. For example:

• Is the product to be inspected or already inspected?
• After the inspection, is product accepted or rejected?
• Which production processes have been completed?
• Is the product released for the final shipment?

The procedure for identification and traceability should be implemented immediately after the purchasing process, implemented during 1st month, because traceability requirements should be communicated to suppliers as part of supplier quality agreements and as part of each purchase order.

Initially, when this process is implemented, there is a tendency to complete forms for every step of the process and to distribute copies of the forms to communicate status. Completing forms and copying paperwork requires labor and adds no value. Therefore, learn manufacturing methods and visual indicators such as color-coding are recommended as best practices for identifying products and their status.

Implementing CAPA Procedures

When a product is identified as nonconforming, corrective actions need to be implemented to prevent a recurrence. Procedures need to include the requirement for planning corrective actions, containing a nonconforming product, correcting nonconformities, and implementing actions to prevent any future nonconformities. These procedures also need to address negative trends to prevent nonconformities before the product is out of specification (i.e., preventive actions). Procedures also need to provide guidelines on how to verify the effectiveness of corrective and preventive actions. Initially, the actions implemented will be specific to a purchased product that is received and rejected. However, over time data analysis of process monitoring and internal auditing will identify additional corrective and preventive actions that are needed.

The effectiveness of CAPA processes, in general, requires three key elements:

1. A well-designed CAPA form
2. Proper training on root cause analysis
3. Performing effectiveness checks

In the CAPA training provided during the second month, the best practices for CAPA form design are covered. The training includes several methods for root causes analysis too. Finally, the training emphasizes using quantitative measurements to verify the effectiveness of corrective actions. It is recommended to identify the quantitative acceptance criteria for an effective corrective action before initiating actions to ensure that the actions planned are sufficient to prevent a recurrence.

Monitoring Your Procedure Implementation Process

As indicated in November’s article, I recommend using quantitative metrics to track the progress of procedure implementation. For example:

1. % of procedures implemented,
2. duration of document review and approval process, and
3. % of required training completed.

Implementing Procedures for ISO 13485:2016

If you already have a quality system in place, you are implementing procedures that are modified for ISO 13485:2016 compliance, some of the same lessons learned to apply. If you are interested in learning more about the changes required for compliance with the 2016 version of the standard, we recorded two live webinars on March 24, 2016.