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Quality Assurance Terms Glossary/H

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H

Hack - A label for someone who knows just enough to teach the wrong things very well...And enough to be dangerous.

Hard Data - Measurements data such as height, weight, volume, or speed that can be measured on a continuous scale.

Hardware Mock-ups - Physical representations of hardware that show designers, managers, and users how an eventual system will work.

Heijunka - The act of levelling the variety or volume of items produced at a process over a period of time. Used to avoid excessive batching of product types and volume fluctuations, especially at a pacemaker process.

Heterogeneous - A characteristic of services that means that for many companies, no two services are exactly the same. For example, an advertising company would not develop the same advertising campaign for two different clients.

Heteroscedasticity - A scatter-plot or residual plot shows heteroscedasticity if the scatter in vertical slices through the plot depends on where you take the slice. Linear regression is not usually a good idea if the data are heteroscedastic.

Hidden Factory - A term introduced by Wickham Skinner that refers to firm activities that have no effect on the customer.

Histogram – (1) A representation of data in a bar chart format. (2) Vertical bar type display of a population distribution in terms of frequencies; a formal method of plotting a frequency distribution.

Homoscedasticity - A scatter-plot or residual plot shows homoscedasticity if the scatter in vertical slices through the plot does not depend much on where you take the slice

Horizontal Deployment - A term that denotes that all of the departments of a firm are involved in the firm’s quality efforts.

Hoshin - From the Japanese term Hoshin Kanri, meaning policy deployment or management by policy. Used in this country to refer to a special focus of an organization. One organization refers to Hoshin as a "planning system for implementing total quality management (TQM)"

Hoshin Planning - Process a policy deployment approach to strategic planning originated by japanese firms. Breakthrough planning. A strategic planning process in which a company develops up to four vision statements that indicate where the company should be in the next five years. Company goals and work plans are developed based on the vision statements. Periodic audits are then conducted to monitor progress.

House of Quality - Another name for quality function deployment.

Human Resource Measures - Ratios that are used to measure the effectiveness of a firm’s human resource practices.

Hypothesis - An assertion subject to verification or proof.

Hypothesis Testing

Hypothesis Errors