Tire engineering defined

Having developed a tire construction for a defined service requirement, the tire engineer must now subject the design to a series of tests (The Tire Rim Association, Inc. Year Book, 2004 European Tyre and Rim Technical Organization, 2004). This testing falls into two performance categories ... 

This chapter describes several properties of dry gases which commonly are normally used by tire petroleum engineer. We will define each property and then give correlations useful for estimating values of the property using normally available information about the gas. 

In this paper the word limitation has been used as a general term to describe any difference fi om the ideal state of the evidence. Counter-evidence is defined in Defence Standard 00-56 as evidence with the potential to undermine safety claims. As Defence Standard 00-56 requires a pro-active search for counterevidence, a limitation needs to be considered as possible counter-evidence unless or until it can be shown that the safety claims are not undermined by that limitation. Suppose for example that a test has failed, and as a result a fault has been found in the software, this limitation (in the correctness of the software) might be counter-evidence. On the other hand if the fault is in some functionality that is not safety related, then it is likely that, fi om a safety perspective, the existence of tire fault is acceptable, and so this limitation is not counter-evidence. Any member of the project who is competent in a particular process area coidd record limitations and assess their impact in relation to the scope of that process. However, counterevidence is wholly related to flie safety of the product and must be assessed by a competent safety professional. Hence it is important that limitations are accurately and transparently recorded in the evidence generated by all of flie project processes and identified in the summary process documents, so that they can be assessed by a safety engineer. 

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