Layout Types and SPC Control Charts

Which layout type typically arranges stations in the sequence of tasks for mass production?

• Process layout

• Product layout

• Cellular layout

• Fixed-position layout

In a process layout, machines are usually grouped by:

• The product family they serve

• The order of operations

• Their similar functions (e.g., milling area, drilling area)

• Shape of the finished part

In Statistical Process Control (SPC), the purpose of a control chart is to:

• Eliminate all variation from a process

• Track financial costs of each operation

• Distinguish normal variation from special cause variation

• Compare your process to your competitor’s

Special cause variation in SPC indicates:

• Random, inherent fluctuation due to temperature or normal wear

• Variation outside normal bounds, often due to a specific, identifiable factor

• Data points always within the upper and lower control limits

• Variation that is desired for product customization

Which control chart is typically used for attribute data, such as the proportion of defective items?

• X-bar chart

• R-chart

• p-chart

• Gantt chart