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What is Data Quality Management? The 6 Dimensions Explained

Data quality management explained: the 6 dimensions of data quality, how to measure and improve data quality, and what the CDMP exam tests in this 11% domain.

CDMP Master Academy·15 February 2025·11 min read

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A professional-level summary covering key definitions, frameworks, and exam-relevant points.

DMBOK Definition

The DAMA DMBOK v2 defines Data Quality as "the planning, implementation, and control of activities that apply quality management techniques to data, in order to assure it is fit for consumption and meets the needs of data consumers." Data Quality Management carries an 11% weighting in the CDMP exam.

The Six DAMA Data Quality Dimensions

DimensionDefinitionExample Violation
AccuracyData correctly represents the real-world entityCustomer address is outdated
CompletenessAll required data is presentEmail field is blank
ConsistencySame data is represented the same way across systemsDate format differs between systems
TimelinessData is available when needed and sufficiently currentInventory data is 24 hours old in a real-time system
ValidityData conforms to required format, range, or business rulesDate of birth is 30 February
UniquenessEach entity is represented only onceDuplicate customer records

Data Quality Management Activities

The DMBOK identifies the following core activities: data profiling (assessing current data quality), data quality rule definition (establishing measurable standards), data quality monitoring (ongoing measurement against standards), data quality issue management (identifying, prioritising, and resolving issues), and data quality improvement (root cause analysis and process change to prevent recurrence).

Data Quality vs Data Cleansing

A critical CDMP distinction: data cleansing is a reactive, one-time activity (fixing known errors). Data quality management is a proactive, ongoing programme (preventing errors from occurring and monitoring quality continuously). The CDMP exam consistently favours answers that describe data quality management as a programme, not a project.

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