Frequently Asked Questions Visit Our Home PageQ: Will the
Reliability MTBF Prediction Report that I purchase from your website satisfy
my requirement for an MTBF?
A: Yes! We have been producing Reliability Prediction Reports for over 30 years. Our clients are companies that must qualify their equipment to Commercial, DOD, DOE, DOT, FAA, NASA, NRC or FDA requirements. Click the “Performance” button on our web page to see our clients and projects. Our reports incorporate the Parts Count methods for failure rate assignment as defined in MIL-HDBK-217 and Bellcore TR-332. These data sources provide the most widely accepted failure rate data and are the industry standards for reliability MTBF predictions. These standards are well known by experts in the reliability engineering field. Our reports are conservative. The Parts Count method defined in
MIL-HDBK-217 and Bellcore TR-332 assumes an
electrical stress ratio of applied stress divided by rated stress = 0.5. Additionally, the mathematical model we use
does not reflect redundant circuitry.
It reflects the reliability series model only. If your equipment contains redundancy and
you are looking for the best possible MTBF value, we can incorporate the
redundant model into the report for an additional charge. However, for most MTBF requirements, the
conservative series model will suffice. Q: What is the
quickest and least expensive way I can get a Reliability MTBF Prediction
Report?
A: Begin by visiting our “Instant MTBF” web
page. Click on the link that reads
“View and print blank Data Input Sheets”.
Give the data input sheets to an engineer and ask him to write down
the quantities of each part type in your equipment. (Note: If you want your report to reflect
the system breakdown by assembly, have the engineer fill out one set of Data
Input Sheets for each assembly in your system). Once the data input sheets are filled in, visit
our “Instant MTBF” web page. Click the “Continue To Step 1” button to begin
entering the parts quantities into the computer. There are 4 steps to complete this
process:
Once the above steps are completed, the Reliability MTBF Prediction Report should arrive in your e-mail within 10 to 15 minutes. Q: What if I can’t
find one of my parts listed on your Data Input Sheets?
A: Three suggestions: 1. Enter the part as a “special part” in the space provided at the bottom of the Data Input Sheet. 2. Enter part quantities adjacent to a part on the data input sheet that is most similar to your part. 3. Send us your parts list or bill of materials (BOM) and we will enter the quantities for you. For this service we charge $1500.00, because an engineer is required to be involved, and we offer a schedule of 24 hours.Q: What Environment should I use for
the Reliability MTBF Prediction Report? A: You will need to select one environment
from the following table. The
Environment Description, Part Ambient Temperature and Semiconductor Junction
Temperature may help you choose the environment that is appropriate for your
equipment.
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