OPEDIA

Pure Know-How
for Operations

AJAX progress indicator
  • a
  • Brainstorming by Analogies
    Typical Sequence for brainstroming by analogies: 1. Find an agreed problem definition in terms of 'How to make X'. 'How to prevent Y', 'How to speed up Z‘ 2. Generate a list of items(...) Read More
  • b
  • Bottleneck
    A bottleneck is a process step that determines the maximum overall output. An example of a bottleneck is a process step for which the Cycle Time is greater than Takt Time. Lean is about making(...) Read More
  • Box-Cox Power Transformation
    The statisticians Box and Cox developed this function which applies a mathematical operation to a set of non-normal data, transforming it into one that more closely approximates a normal(...) Read More
  • Boxplot
    The Boxplot is a typical frequency plot containing a lot of information in the graph. It is a graphical analysis tool used to investigate the effect of discrete inputs (X) on continuous(...) Read More
  • Brainstorming
    Brainstorming is a creativity technique used to collect ideas. Typical Sequence: Title the brainstormingSet time (20min)Conduct brainstorming involving all team membersClarify questions(...) Read More
  • Brainwriting 6-3-5
    The name Brainwriting 6-3-5 comes from the process of having 6 people write 3 ideas in 5 minutes. Each person has a blank 6-3-5 worksheet Typical Sequence: Write the problem statement at(...) Read More
  • Business Case
    The business case is a brief justification for why this project is worthwhile pursuingIn most cases, it includes the financial rationale for the projectIt links directly to the problem(...) Read More
  • c
  • c-chart
    The c-chart is a type of Control Chart which is used to monitor a process over time and to distinguish between common and special cause variation for discrete count datawhen analyzing the(...) Read More
  • Calibration
    The calibration of a Measurement System corrects for a measurement bias or offset (when the measurement system is  inadequate compared to the standard value). Example: use of a standardized(...) Read More
  • Capability Analysis
    see Process Capability Read More
  • Causal Thinking: y=f(x)
    Six Sigma builds on causal thinking to solve problems sustainably. It is important to stop fire-fighting and work to eliminate the root causes of problems. The equation y=f(x) stands for(...) Read More
  • Cause and Effect Diagram
    see Ishikawa Diagram Read More
  • Central Tendency
    The central tendency describes the center of a distribution of continuous data. Common measures of central tendency are the arithmetic mean (average), the median and the mode. Learn more(...) Read More
  • Changeover
    The process which is needed to change the production line for performing another operation, e.g. another product or another service. Read More
  • Changeover Time
    Changeover time is a Lean Metrics describing the elapsed downtime between the last units of the batch before the changeover and the first good units of the following product at defined speed(...) Read More
  • Constant Number Method
    The Constant Number Method (or Fixed-Value Method) is a Poka Yoke technique making sure the operator makes a certain number of movements and/oruses a fixed number of parts at each(...) Read More
  • Contact Method
    The Contact Method is a Poka Yoke technique using a part's physical attributes such as its color, shape, size, dimensions or weight to prevent or detect errors. Examples: Color-coding for(...) Read More
  • Continuous Data
    Continuous data are usually measured data, where a scale and a unit make sense. They can be described using: measures of central tendency (arithmetic mean, median, mode)measures of(...) Read More
  • Continuous flow (One-piece flow)
    In traditional processes, work moves in batches or is stuck in queues Reducing the move quantity and increasing the moving frequency will make the flow “more” continuousContinuing to reduce(...) Read More
  • Control Limit
    The control limits are calculated from the data. In a Control Chart, they are displayed as horizontal lines. For normally distributed data, they are an estimation of 3 standard deviations using(...) Read More