The operation load, i.e. The Part Stress section of MIL-HDBK-217 includes complete details on all the equations and how to assess the variables used in the equations. This means that most BOMs cost roughly the same. We hope this article helps you make great decisions about your partners and helps alleviate some of the complexities of manufacturing electronics. Telcordia can set an upper confidence level on calculations and factor in burn-in data; MIL-HDBK-217 does not offer these features. Good CM’s don’t produce tools or circuit boards by hand. The full name of the standard is GJB/Z 299: Reliability Prediction Model for Electronic Equipment. - Any American manufacturer who insists they are competitive with Asia in terms of manufacturing costs. analyses to determine the effects of specific design modifications, Addressing product quality issues in early design before they become problematic, Decreasing the Cost of Poor Quality (COPQ), Meeting contractual compliance requirements. At any rate, the original point of this post was to question what rates of failure are acceptable, and what I find amazing is that there is still an expectation that you can have literally millions of homes built without issue, have a few dozens experience a problem, and it results in this level of rhetoric. The Parts Count reliability prediction is useful in early design stages when the design is still in progress and not all operating parameters are known. How do I choose which Reliability Prediction method to use? Despite the ubiquitous nature of electronics in our everyday lives, very few of us understand how electronics are made or what goes into building consumer electronic (CE) devices at volume (let’s say 20,000+ units). This can be a deal-breaker for some entrepreneurs. The most recent China GJB/z standard is China’s GJB/z 299C. Apple recently spent five years building a relationship with an Asian contract manufacturer (CM) before letting them build the iWatch. So if a manufacturing rep’s CM doesn’t have injection molding facilities, you should hear about that up-front. Look for companies that guarantee to a 5% failure rate (that’s half the CE average) or to zero-failure if desired. The failure rate of a system usually depends on time, with the rate varying over the life cycle of the system. Failure rates obtained from this source for the period 1999–2001 are presented. The latest versions of these databases, NPRD-2016 and EPRD-2014, can be used alongside the prediction standards and work well together. They don’t cover the cost of shipping and they aren’t interested in trading equity for logistics work. We need to learn as an ecosystem that complex systems and foreign cultures are navigable with the right knowledge and tools and with our eyes wide open. By factoring in test data information, your predictions are weighted according to the amount of test data you have. Alibaba, the Hong Kong Trade Development Council (HKTDC) and hundreds of other websites match unwitting entrepreneurs with electronics factories. An example equation for capacitors in 217Plus 2015 Notice 1 is: λP =πG* πC * (λOB * πDCO * πTO * πS + λEB * πDCN * πTE + λTCB * πCR * πDT ) + λSJB * πSJDT + λIND. 217Plus also considers the operating profile of your system and provides results in units based on calendar hours – another differentiating factor. Also, the types of parts supported in each reliability prediction standards varies, so it can be ideal to select the reliability prediction standard which supports the types of parts included in your design. Its revisions and updates are designated with suffix notations similar to MIL-HDBK-217. Relyence Corporation has just released the latest version of the[...], To kick off the new year, we are excited to[...], Reliability Prediction analysis is one of the core techniques used[...]. But the cultural divide between Asian manufacturers and American entrepreneurs amplifies the potential for harm and makes scams more difficult to recognize. Quality can not be inspected in after the fact. failure rate is estimated using the base failure rate of the component. By adjusting your failure rates based on this real-world information, your predictions will more accurately reflect your product performance. A. yes B. no * If rate is not acceptable, what would be an appropriate “high criticality” failure rate, i.e., what would be your definition of “never”? MTBF for electronics life entitlement measurements is a meaningless term. Manufacturing electronics is really, really hard; no one can become an expert, or even competent, in a short amount of time. It is defined as the frequency with which an engineered system or component fails, expressed in failures per unit of time. Oftentimes, NPRD-2016 and/or EPRD-2014 can be used to include failure rate estimates for devices not modeled in the prediction standards. This is where the value in what they do is realized, so make sure your rep mentions relationship and has a few stories to back it up. In the case of the two circled columns in the second table, the lower confidence limit of the allowable failure rates given are 2.5% (for 10 out of 200) and approximately 4% (for 14 out of 200). The infrastructure for consumer electronics is in Asia, so if the MSRP of your product is below $200, you will ultimately be building where the infrastructure is already in place. ((Appendix ONE is a list of scams we currently know to be operating in the San Francisco/Denver startup communities.)). Companies who enjoy good Guanxi are secretive and unwilling to help startups with their projects. Augmenting failure rates based on data obtained from laboratory test data. We LOVE our American manufacturing partners. 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