确定工人花在不同活动类别上的时间比例。
- 方法: 工程, 产品设计, 项目管理
工作取样

工作取样
- 持续改进, 效率, 精益制造, 精益生产, 流程改进, 生产率, 价值流映射
目标
如何使用
- 观察人员在不同时间对工人进行随机观察,并记录他们所从事的活动。每类观察所占的百分比可估算出这些活动所花费的时间。
优点
- 与持续观察相比,成本相对较低,干扰较少;可以很好地概括时间在各项任务中的分配情况;有助于确定人员配备水平或发现效率低下的问题。
缺点
- 准确性取决于观察次数和抽样时间的随机性;不能提供有关工作方法或具体任务绩效的详细信息;可能存在观察者偏差。
类别
- 人体工程学, 制造业, 项目管理
最适合:
- 确定工人用于各种活动的时间比例,以提高效率或设定标准。
Work Sampling is particularly effective in industries such as manufacturing, healthcare, logistics, and service sectors, where understanding the allocation of time across various activities can significantly enhance operational efficiency. This methodology is often employed in the project phases of process improvement, work measurement, and resource allocation to identify inefficiencies or optimize workflows. Initiation typically comes from management or process improvement teams, including industrial engineers, operations managers, or even quality assurance professionals who seek to assess productivity levels. Participants in this methodology include workers across different job functions, as random observations of their activities yield valuable data on how time is spent. For instance, in a manufacturing environment, work sampling can reveal whether operators are spending excessive time on rework or setup activities, thus informing decisions on training or equipment investments. In healthcare, this method can assess how much time caregivers allocate to patient interactions versus administrative tasks, leading to redistributions of responsibilities or staffing changes. Work sampling provides a snapshot view, and with its less intrusive nature compared to continuous monitoring, it respects workers’ privacy while effectively gathering necessary data. The simplicity of implementation, combined with the ability to execute the observations across various shifts and conditions, makes it a versatile tool for organizations aiming to set realistic performance standards and improve overall productivity.
该方法的关键步骤
- Define the categories of activities that need to be observed.
- Determine the time frame and intervals for making random observations.
- Conduct observations at predetermined random times throughout the observation period.
- Record the specific activity each worker is engaged in during each observation.
- Calculate the percentage of total observations for each activity category.
- Analyze the data to identify trends and areas for improvement.
专业提示
- Utilize stratified sampling to ensure diverse representation of roles and tasks, reducing bias in activity assessment.
- Incorporate time-triggered observations during peak operational periods to capture realistic work patterns and fluctuations.
- Use data analytics tools post-observation to quantitatively analyze findings, identifying trends and anomalies for deeper insights.
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