Meyer Joachim, Sheridan Thomas B
Tel Aviv University, Israel.
Massachusetts Institute of Technology, Lexington.
Hum Factors. 2017 Sep;59(6):901-910. doi: 10.1177/0018720817698616. Epub 2017 Mar 17.
We address the question of necessary conditions for users to adjust system settings, such as alarm thresholds, correctly.
When designing systems, we need to decide which system functions users should control. Giving control to users empowers them, but users must have the relevant information and the ability to adjust settings correctly for their control to be beneficial.
Using the example of adjusting an alerting threshold, we analyze the conditions for when users can and when they cannot possibly adjust threshold settings adequately.
We identify two obstacles that limit users' ability to adjust thresholds adequately: (a) the difficulty of determining the correct threshold settings, especially because of users' strong response to false positive indications, and (b) the difficulty of collecting the information necessary for setting the threshold.
Users often cannot identify the optimal settings for a system, so it is unlikely that they choose adequate system settings.
System designers must consider the difficulties users face and analyze them explicitly when deciding on user involvement in processes.
我们探讨用户正确调整系统设置（如警报阈值）的必要条件问题。
在设计系统时，我们需要决定用户应控制哪些系统功能。给予用户控制权能增强他们的能力，但用户必须拥有相关信息并有能力正确调整设置，其控制才会有益。
以调整警报阈值为例，我们分析用户何时能够以及何时无法充分调整阈值设置的条件。
我们识别出两个限制用户充分调整阈值能力的障碍：（a）确定正确阈值设置的困难，特别是由于用户对误报指示的强烈反应；（b）收集设置阈值所需信息的困难。
用户通常无法识别系统的最佳设置，因此他们不太可能选择适当的系统设置。
系统设计师在决定让用户参与流程时，必须考虑用户面临的困难并进行明确分析。
