CNC program precision prototype precision brass coupling
- D0 phenomenon and emergency response activities。 CNC program precision prototype precision brass coupling
Assess the need for the 8D process based on the phenomenon, and if necessary, take an Emergency Response Action (ERA) to protect the customer and begin the 8D process. The 8D process distinguishes symptoms from problems. Most of the applicable criteria are symptoms. No symptoms will not know there is a problem. A symptom is a measurable event or result that indicates that one or more problems exist. The consequences of this event must be experienced by one or more customers; problems are deviations from expectations or any detrimental consequences of unknown causes; symptoms are manifestations of a problem. When receiving complaint information, the quality department should try to confirm the following information on the customer complaint report for investigation: Product number and product name Customer name, contact person and address Defect description, number of non-conforming products Traceability information, such as LOT NO, invoice number, etc. For claims, the model and other information should be obtained as much as possible; if there is, the necessary information such as sample photo labels and failure rates should be obtained from the customer.
In the case of core leakage or serious complaints, the person receiving the complaint should immediately notify the quality manager and general manager. QE should contact the customer within one business day of receiving the complaint. The following information should be communicated to the client: inter-departmental teams and contact details; confirmation of information obtained; other information necessary to investigate the problem; progress of contingency actions; expected completion time of contingency and corrective actions; Such as the progress of the problem and the expected delivery; all responses to the customer should be recorded. According to the information obtained, QE confirms the bad situation according to the three-occurrence principle (on-site, actual object, phenomenon); if it is a visual defect, try to obtain photos or samples (confirm the existing object); try to collect detailed information about the situation of the site where the defect occurred. Intelligence (confirmation of on-site phenomena), emergency measures need to be carried out within 24 hours. CNC program precision prototype precision brass coupling
- D1 establishes 8D team
8D without a team is a failed 8D. In fact, the original name of 8D is called team-oriented problem solving steps. The 8D team needs to be composed of people who have product and process knowledge, can manage time, and have authority and skills. At the same time, an 8D team leader must be appointed. Because what we’re trying to do is create a group of people with process/finished product knowledge, determine the time, responsibilities and techniques of the required discipline; determine the group leader.
- D2 problem description
By identifying quantifiable terms: who-what-when-where? Why – How – How Much (5W2H)? Identifying objects and defects (asking “what went wrong, what is a defect, what went wrong”) is an object; asking “what went wrong” helps the group center the two basic elements needed for a problem statement (objects and defects).
Operation process of receiving customer’s defective samples: confirm the production date of the defective samples; confirm the basic appearance of the samples, and take photos to leave evidence; confirm whether the defective samples can reproduce and record the confirmation data according to the normal production process, and take photos or videos to leave evidence; Check the FTT situation at the time of production date to confirm whether there is the same or similar defect at that time; confirm whether there are any changes in the man-machine material law ring according to the production date; if it does not reproduce (NTF), it is carried out according to the non-reproducing operation process. CNC program precision prototype precision brass coupling
- D3 Containment ICA
Identify and implement containment measures, isolate the consequences of the problem from all internal/external customers, and verify the effectiveness of the containment measures. ICA Cause Analysis and Verification of the Cause is any action that protects the customer from the symptoms of one or more problems: Address the symptoms of the problem; verify effectiveness prior to execution; monitor during execution; document; ICA requires 3 It is determined and implemented within working days. The scope of containment is the customer’s inventory, in-transit products, and the number of inventory in the factory and related processing (return, rework, scrap, etc.).
- D4 Root Cause Analysis
Find the real cause, only by finding the real cause, can the problem be effectively solved. It doesn’t make any sense if you just mess around and get things done. So find out all the potential causes, test the potential causes one by one, isolate and verify the root cause, identify different corrective actions to eliminate the root cause; use quality tools such as fishbone diagrams, FTA, brainstorming to find all possible factors, and carry out Verify, and ultimately find the root cause and outflow cause.
- D5 Select and Validate Corrective Action PCA
Corrective measures are screened out through quantitative tests of different corrective measures, and emergency measures when necessary are determined according to risk assessment. The solution to the problem should ensure long-term results. I have seen that in the 8D report of the supplier, there are seven lines in a row of seven lines in the D5. Strengthen, strengthen worker training, strengthen the number of inspections, strengthen the inspection force, strengthen the process control – a bunch of empty words. The extent to which it is strengthened has not been quantified. The specific plan is written with specific data. For example, the original inspection frequency is 10 inspections, and now it is strengthened to 5 inspections. The same strengthening training, the original training frequency is how many times, and now the training plan is attached here, so that our countermeasures can be improved. support. CNC program precision prototype precision brass coupling
07 .D6 Implement and confirm corrective actions
Identify and implement the best corrective actions, select and monitor current control methods, and implement contingency actions if necessary.
- D7 Prevention of occurrence in similar circumstances or future recurrence
Put forward preventive suggestions, and carry out horizontal deployment, update CP, PFMEA, SOP and other labeling documents, and implement preventive measures. Complete 8D needs to be submitted within 5 working days after receiving customer complaints.
- D8 closes, signature and panel confirmation
After the 8D requirement is issued, the issuer is responsible for verifying the effectiveness and implementation effect of the subsequent 8D, until the defect PPM of the problem is greatly improved and shows a steady downward trend after implementation. Closed only after the effect is verified by QM or PM. Otherwise, root cause analysis and implementation of corrective and preventive measures need to be repeated.
- Three basic stages of 8D implementation
one. Initial launch of 8D
Revise the problem management process, for major problems must be closed with 8D report. The standard to use 8D is to meet the six requirements for starting 8D, the problem involves functional safety, failure mode has a huge impact or leadership concerns. According to such a standard, 10-20 questions are screened out of 100 questions and an 8D report needs to be written. Develop 8D report management procedures to guide specific implementation. What if employees don’t know how to write 8D, or the 8D report they write is just a formality? The management procedures must clearly require and formulate specific templates, specifying the specific filling requirements for each step of 8D, the time requirements for each step and the approval level of the 8D report. The purpose is to clarify the application of 8D, solve quality problems and prevent its recurrence. CNC program precision prototype precision brass coupling
Continuous training, repeated training on program document requirements and 8D report writing, and instructing the preparation of 8D reports for some practical problems. If the 8D reports submitted to the quality department do not meet the requirements, they will go back and rewrite them. Powerful propulsion tools of course need the support of leaders. Leaders are very concerned about many major issues. Of course, they hope to report to him clearly. Of course, there will be some leaders who may not pay attention or support, and have no time to sign and confirm the problem in person. At this time, the quality person can clearly inform the leader that the process stipulates that you must sign and confirm, and implement it according to the system process. If the problem recurs in the future, it is also justifiable to criticize the leadership and should take responsibility.
two. 8D and issue close table parallelism
Although the 8D report is only used for major issues, the employees have a basic understanding of the requirements of the 8D report. At this time, the 8D idea is integrated into the quality problem closure table in the early stage, and the modification of the problem closure table is complicated. For example, if the preventive measures are listed, 10 measures are listed for employees to judge whether they have done it, whether the FMEA is modified, whether the work instruction is modified, whether Include the typical case base, whether the process needs to be optimized, whether other similar projects are used, etc. In this way, every employee can gradually form an 8D idea without knowing it, and they will not suddenly feel that a lot of trouble has been added and strongly resist it, and they can also experience the sense of accomplishment brought by the comprehensive and thorough rectification of the problem.
three. Fully implement 8D
At this stage, the form process is simplified. All issues are dealt with in the 8D way, but issues are closed without the approval of multiple leaders. The process of closing the problem has been E-shaped, and everyone can directly fill in the 8 steps online, and only two levels of confirmation are required for closing. 8D, the most basic and common management tool, will gradually become the habit of your own business.
It takes a lot of time and energy to implement 8D in an enterprise. It is not overnight. The key is to really understand your own enterprise and analyze which method is most suitable for you. You must not blindly follow the trend. Changing corporate habits and the company’s quality culture cannot be accomplished overnight. During this period, various difficulties will be encountered, but we must persevere in order to achieve qualitative changes. CNC program precision prototype precision brass coupling
