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Coordinability And Consistency

argumentative Essay
2940 words
2940 words
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IV. COORDINABILITY AND CONSISTENCY IN SOCIOTECHNICAL SYSTEMS The concept of coordinability and consistency will now be introduced and an attempt will be made to show how the same is related to accident causation. In other words, the principle of coordinability and consistency will be used to find the point of failure in the sociotechnical system which resulted in an accident. It may be argued that such an approach for accident causation is relatively old, however the attempt being made in this paper is to show that coordinability and consistency can be applied to modern systems as well, showing that it is still an important concept till date for system safety. All sociotechnical systems are multilevel systems. The design and analysis of such systems is usually broken down into subsystems in a in a hierarchical structure. [4] A diagram of a standard two-level hierarchical system is shown in Fig 4, where, as expected, two levels can be found, namely the lower level and the upper level. The lower level consists of the process level, where the process level has been divided into N sub-systems. The sub-systems are connected to each other because there is either material or information flows between these sub-systems. Each sub-system has its own decision unit, which tries to control the behavior of the sub-system so that the objectives of this particular sub-system would be met. The decision unit can also use feedback information from the sub-system to improve its’ control policy’. However, quite often the objectives of the sub-systems are conflicting, resulting in a poor overall performance. [5]A system in this context is defined as a function S: UY between a set of inputs U and a set of out-puts Y. In particular, a decision-... ... middle of paper ... ...n thus be seen that lack of consistency was used to identify accident causation. VI CONCLUSION Any given sociotechnical system can be operated and used safely if and only if coordinability and consistency are ensured from each level of the hierarchy to the next. It has also been shown that the lack of any one of these two terms will result in an accident, and it can successfully be said that coordinability and consistency can be used for identifying accident causation from where further investigations can take place. It must be remembered that there is nothing more difficult to plan, more doubtful of success, nor more dangerous to manage than the creation of a new system. As systems become more and more sociotechnical, more complex and more hybrid ensuring that the concept introduced above holds true will assist us in developing more safe systems.

In this essay, the author

  • Explains that often the objectives of the sub-systems are conflicting, resulting in poor overall performance.
  • Explains how to check and see if a new flight level is possible and convey the same to the flight crew.
  • Explains that both the supremal and infimal unit have their own decision problems, and each problem has a solution. coordinability of the system is dependent on answering the question, "is the solution executable?"
  • Explains that the multilevel hierarchal system is consistent if the overall decision problem is solved when the upper and lower level decision units solve their own decision problems.
  • Explains that if the supremal and infimal units solve their respective decission problems, implies that coordinability exits.
  • Explains the concept of coordinability and consistency, but how can these concepts be applied for system safety and accident causation.
  • Explains that the tenerife airport disaster is considered the worst aviation disaster in the last century, resulting in an estimated 583 fatalities.
  • Explains the purpose of this analysis is to show the lack of coordinability as the main cause for the accident.
  • Concludes that if coordinability had been accomplished the accident would have been avoided.
  • Analyzes the piper alpha disaster as an illustration of the lack of consistency in accident causation.
  • Explains that gas was handled on the piper alpha platform and compressed prior to its export to shore. heavier components were removed from the gas, collected, and then pumped back into the main oil line via an injection pump.
  • Explains that the day crew did not complete the work on the psv, which was temporarily replaced with a blind flange until maintenance resumed. the night shift crew and the offshore installation manager were not informed of this situation.
  • Explains the purpose of this analysis is to show the lack of coordinability as the main cause for the accident.
  • Explains that the concept of coordinability and consistency is used to find the point of failure in the sociotechnical system which resulted in an accident.
  • Explains that the system s is said to solve an optimization problem if the decision corresponding to an input u € u, minimizes a given objective function that depends, in general, on both x and
  • Explains that an upper-level decision-making unit called the coordinator coordinates the decision making of each sub-system via feedback to improve the performance of the system.
  • Explains that coordinability is of central importance for multilevel systems. it means that there is at least one solution to the supremal decision problem.
  • Describes the fatal collision between two boeing 747s on the runway of los rodeos airport on march 27, 1977.
  • Concludes that lack of coordinability can be viewed as one of the main causes of accident causation.
  • Describes how the crash occurred between bashkirian airlines flight 2937 and dhl flight 611 over überlingen and owingen in southern germany.
  • Analyzes how the supremal unit provided a solution for the decision problem which was properly executed by the infimal unit. however, the lack of consistency was not communicated to the oim or the night shift crew.
  • Explains that sociotechnical systems can be operated and used safely if coordinability and consistency are ensured from each level of the hierarchy to the next.
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