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In engineering, redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the form of a backup or fail-safe, or to improve actual system performance, such as in the case of GNSS receivers, or multi-threaded computer processing.
In many safety-critical systems, such as fly-by-wire and hydraulic systems in aircraft, some parts of the control system may be triplicated, which is formally termed triple modular redundancy (TMR). An error in one component may then be out-voted by the other two. In a triply redundant system, the system has three sub components, all three of which must fail before the system fails. Since each one rarely fails, and the sub components are expected to fail independently, the probability of all three failing is calculated to be extraordinarily small; often outweighed by other risk factors, such as human error. Redundancy may also be known by the terms "majority voting systems" or "voting logic".

Redundancy sometimes produces less, instead of greater reliability – it creates a more complex system which is prone to various issues, it may lead to human neglect of duty, and may lead to higher production demands which by overstressing the system may make it less safe.

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  1. C

    Non Genuine Redundancy

    I was advised me position was being made redundant throughout the entire organisation and replace with a new position Position Description: nearly identical with some additional tasks and $2.50 per hour pay rise. Guaranteed the position is mine on several occasion by the interview panel but had...
  2. C

    VIC Redundancy entitlement

    Hi, I work for a large company that announced it was closing one of it’s operations late last year. The only official documentation I have received states that my employment would be terminated at the end of March 2020 with a note at the end “to be confirmed at a later date”. Since then they...
  3. davemm

    SA genuine redundancy or unfair dismissal

    I did an online induction (middle of the week) to attend a worksite next following week. By the end of the week (induction week) i was made redundant due to unavailable work load required. also stated that they didnt win the project. due to union investigation they lied about not winning the...
  4. N

    NSW Redundancy Help

    In a redundancy package if superannuation in a work contract is 15.4% and the award is 9.5% which percentage needs to be calculated? If hours are owed for time in lieu and there is no reference to it in the Deed of Release is it fair to ask it to be included
  5. L

    WA COVID-19 role change, jobkeeper and redundancy

    Hi. I am currently on JobKeeper since mid April when my employer advised of a downturn in sales. At the same time, my employer changed my role and hours of work e.g. no longer a sales person working 37.5hrs, I am now a store person working 15 hrs. They even gave me a new position description...
  6. S

    Employer making me pay course fee

    I had signed up to do a certificate IV course in my review at the company I was made redundant through in early April, they agreed to pay for me to do the course. After being made redundant we tried cancelling the course as I didn’t want to continue the course, as I couldn’t afford the payments...
  7. M

    NSW Made redundant - commissions being withheld

    Hi there, Recently (with Covid-19 used as an excuse but not genuine) I was made redundant from my job of nearly 10 years. Part of my job involved sales, from which I earned commissions above my base pay (base is really low so commissions are my lifeline). My former employer (got along great with...
  8. N

    Contractor and redundancy entitlement

    Hi, my employer is going to engage a contractor in the capacity of BDM, and currently working on the agreement, however he is unsure if this contractor will be entitled to any redundancy payment if his service is no longer required in the future. Hope you can assist. I understand the agreement...
  9. K

    NSW Can an employer deny access to payslips

    Hi there, I want to ask a question regarding pay slips, as I have been made recently redundant from a retail job that I had been working in for 15 years after a takeover. My ex boss said that I would be paid within two weeks after my termination. As a casual employee I only have long service...
  10. J

    WA Redundancy question at Uni

    I work in IT for a large Uni and we have just had another restructure. In my team we have 3 x Software Analysts, which includes me. They have reduced the number of Software Analysts down to 2, so the three of us have to apply for the 2 roles. We are the same level, same job titles and same job...