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An error-tolerant design (or human-error-tolerant design [1]) is one that does not unduly penalize user or human errors. It is the human equivalent of fault tolerant design that allows equipment to continue functioning in the presence of hardware faults, such as a "limp-in" mode for an automobile electronics unit that would be employed if ...
The Center for Universal Design at NCSU established a set of Principles of Universal Design [5] based on UD to guide and evaluate the design process, with a goal toward creating more accessible products and environments. Universal Design for Instruction is an educational framework and set of strategies that applies both UD and the Principles of ...
Universal design is the design of buildings, products or environments to make them accessible to people, regardless of age, disability, or other factors. It emerged as a rights -based, anti- discrimination measure, which seeks to create design for all abilities.
For example, if component B performs some operation based on the output from component A, then fault tolerance in B can hide a problem with A. If component B is later changed (to a less fault-tolerant design) the system may fail suddenly, making it appear that the new component B is the problem.
Following design patterns should be combined together to make the system more fault tolerant: retry, fallback, timeout, circuit breaker, and bulkhead pattern. [ 3 ] [ 4 ] To make your system more fault tolerant, you should measure 99th percentile latency and keep the remaining 1% (aka tail latencies) in check through self healing mechanisms.
Without message signing, Byzantine fault tolerance can only be achieved if the total number of generals is greater than three times the number of disloyal (faulty) generals. There can be a default vote value given to missing messages. For example, missing messages can be given a "null" value. Further, if the agreement is that the null votes are ...
Taguchi realized that the best opportunity to eliminate variation of the final product quality is during the design of a product and its manufacturing process. Consequently, he developed a strategy for quality engineering that can be used in both contexts. The process has three stages: System design; Parameter (measure) design; Tolerance design
The standard (size) tolerances are divided into two categories: hole and shaft. They are labelled with a letter (capitals for holes and lowercase for shafts) and a number. For example: H7 (hole, tapped hole, or nut) and h7 (shaft or bolt). H7/h6 is a very common standard tolerance which gives a tight fit.