Change Management
CHiL has implemented a Change Management System in order to control and report product and process changes to customers. CHiL’s approach to managing change focuses on five key area:
- Classification
- Approval
- Qualification
- Implementation
- Customer Notification
Classification
Proposed changes are classified in one of two levels Major or Minor by the magnitude of the proposed change. The classification level dictates the level of approval and qualification required.
Minor Changes - include any change to a process, material, method, or product design that does not represent a fundamental change to the process technique, material components, or product functionality. Generally speaking, this is a change that does not affect the form, fit, function, quality, or reliability of the product. These changes typically require no formal qualification or notification to customers.
Major Change - includes any change that represents a fundamental change to process technique, material components or product design and will generally require a formal qualification. This level includes full or partial transfers of existing, qualified, core processes. Generally, these changes may affect the form, fit, or function of the product or might adversely affect the quality or reliability of the product. These changes may require customer notification based on agreements and contracts. JESD47 is the basis for Major Change definition, and is augmented by any customer specific requirements or contractual agreements.
Approval
Proposed changes to products or processes are reviewed in a controlled document called a Product Change Notice (PCN) generated by the change requestor then approved by the Change Review Board (CRB). The PCN will be sent to customers to notify them of the upcoming change. The CRB has been established to provide for the proper review of proposed changes. The CRB will include all functions within CHiL that are appropriate for the change being suggested. As a minimum, Design Engineering, Sales and Marketing, and Operations/Quality will be involved in all changes. The Change Notice includes the following types of information, as applicable:
- Proposed classification level
- Reason for the proposed change
- Potential benefit/impact to customers
- Complete risk assessment
- Qualification plan
Qualification
Proposed changes requiring qualification will be evaluated and tested via a qualification plan that will help minimize risks to customers. The content of the qualification is dependent upon the proposed change. JESD47 delineates the core guidelines for determining what constitutes a major or minor change and the appropriate qualification testing for the proposed change.
Among the qualification tests that might be applied are:
| HTOL |
Solderability |
Moisture Sensitivity |
| Temperature Cycle |
IR Reflow |
Electrical Test |
| ESD Testing |
Wire Pull |
Mark Permanence |
| Latch-up |
Ball Shear |
HAST |
| Autoclave |
Die Shear |
Other |
Implementation
The change is implemented upon completion of the review and approval cycle. After the Change Notice has been approved and the qualification testing successfully completed, the change is authorized by the CRB. At this time, the Product Change Notice is reviewed and approved, becoming the final Product Change Notice (PCN) and customer notification is completed as required.
Customer Notification
Customers are notified of changes by a Process Change Notice (PCN). The Quality group is responsible for ensuring all PCNs reach the designated customers and for ensuring that customer requirements and deliverables are satisfied as they relate to acceptance.
Released PCNs (access for registered users)
| Part Number |
Released PCNs |
| CHL8500, CHL8510 |
PCN001 |
|
