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Key variations Top-down versus Bottom-up Top-down approaches break down huge jobs into smaller subtasks, whereas bottom-up approaches first select to directly solve the task's various essential components.
Once the system and objectives have been established, the analysts and management team must choose between a Top-down approaches and bottom-up understanding of the system whose reliability needs to be improved. Top-Down, When management wishes to increase general reliability or when they are unsure of the potential root causes of problems, they utilize a top-down strategy.
A facility manager is likely to request a Top-down approaches review if he notices that production losses due to unplanned downtime are rising or that maintenance expenditures for the entire facility have increased. He may also give the go-ahead for this kind of investigation if he has reason to believe that a widespread root cause issue—for example, poor operator training—is having a negative impact on a number of facility subsystems.
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The difference in speed and efficiency between top-down and bottom-up attentional control was assessed in an experiment conducted by jonides and yantis (1988). the experiment examined how the abrupt onset of a visual stimulus captures attention. the research showed that the response time for participants who searched through an array of letters for a target letter increased with the number of letters to be searched when the target follows top down and bottom up approaches.
