Mathematical Problems in Engineering / 2020 / Article / Tab 7

Research Article

A Maintenance Task Similarity-Based Prior Elicitation Method for Bayesian Maintainability Demonstration

Table 7

Evaluation rules.

Maintainability attributeEvaluation rules

Entity reachability ()Good: can observe the maintenance component comfortably, and there is a wide observation angle; (7–10)
General: can generally see the outline of the maintenance component, though it can easily cause eye and body fatigue; (4–6)
Poor: prone to fatigue in this pose. (0–3)
Visibility ()Good: clear line of sight, and there is enough light; (7–10)
General: the line of sight is blocked, or the light is dark; (4–6)
Poor: the line of sight is seriously blocked, or the light is insufficient. (0–3)
Maintenance space ()Good: no restrictions on the maintenance space for operating posture; (7–10)
General: maintenance space for the body is basically enough, but the operator’s posture is abnormal; (4–6)
Poor: there is not enough maintenance space for a body. (0–3)
Tools ()Good: do not need the aid of auxiliary tools; (7–10)
General: need auxiliary tools sometimes; (4–6)
Poor: dependent on auxiliary tools. (0–3)
Technical level of the maintainers ()Good: familiar with the relevant technical knowledge and can quickly determine the operation process and solve the problem; (7–10)
General: is familiar with the relevant knowledge and can solve problems by referring to the operation manual; (4–6)
Poor: only a general understanding of the situation and how to carry out the relevant work. (0–3)
Maintenance position ()Good: ground; (7–10)
General: have to climb to the machine; (4–6)
Poor: need to stand outside the machine or in a similar position to the machine. (0–3)
Security ()Good: no danger of being injured by heavy objects and there are no sharp edges that may scratch or danger of electrical shock; (7–10)
General: there is a certain security threat, sometimes there are sharp edges that may cause bumps or scratches; (4–6)
Poor: there is a security threat. (0–3)

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