ITIL 4 CI study materials
ITIL 4 CI study resources

ITIL 4 CI key terms

ITIL 4 CI · Get comfortable with the vocabulary.

Continual improvement

A recurring activity performed at all levels of an organization to make products, services, and practices perform better and to align them with changing business needs and objectives.

Related: Improvement register, Value stream, ITIL continual improvement model
Improvement register

A record that logs improvement opportunities, their status, ownership, and expected benefit so that work on them can be prioritized, tracked, and reviewed over time.

Related: Continual improvement, Backlog, Prioritization
ITIL continual improvement model

A high-level, iterative framework of six steps that guides an organization from understanding its current situation through to embedding and sustaining improvements.

Related: Continual improvement, Baseline, Embedding
Vision

A concise statement of the desired future state that explains why an improvement is worth doing and what success will look like for the organization and its customers.

Related: Baseline, Improvement register, Value
Baseline

A documented snapshot of current performance, capability, or maturity, used as a reference point for measuring whether an improvement has actually delivered change.

Related: Vision, Metric, Gap analysis
Gap analysis

A comparison of the current state with the desired future state that identifies what is missing or underperforming and helps define the work needed to close the difference.

Related: Baseline, Vision, Improvement register
Value stream

A series of steps an organization uses to create and deliver products and services to consumers, which improvement work maps and optimizes to remove waste and delay.

Related: Value stream mapping, Waste, Value
Value stream mapping

A technique that visualizes the flow of work, information, and decisions through a value stream to expose bottlenecks, handoffs, delays, and non-value-adding activity.

Related: Value stream, Waste, Lead time
Waste

Any activity, output, or resource use that consumes effort without adding value for the customer, such as rework, waiting, over-processing, or unnecessary handoffs.

Related: Value stream mapping, Value, Lead time
Value

The perceived benefit, usefulness, and importance of something to a stakeholder, which improvement efforts aim to protect, increase, or restore.

Related: Waste, Value stream, Outcome
Outcome

A result or change of state that a stakeholder experiences because of a product, service, or improvement, as distinct from the outputs and activities that produced it.

Related: Output, Value, Metric
Output

A tangible or intangible deliverable produced by an activity or process, which may or may not lead to a meaningful outcome for stakeholders.

Related: Outcome, Value, Metric
Metric

A quantifiable measure used to assess performance, progress, or quality, ideally defined with a clear formula, data source, and target so results can be compared and acted on.

Related: KPI, Baseline, CSF
KPI

A key performance indicator: a metric chosen because it is critical to judging whether an organization, practice, or improvement is achieving its important objectives.

Related: Metric, CSF, Baseline
CSF (critical success factor)

A condition, capability, or element that must be in place for an organization or improvement initiative to succeed; it points to what must go right.

Related: KPI, Metric, Continual improvement
PDCA cycle

A repeating four-phase cycle of plan, do, check, and act used to test changes, review results against expectations, and then standardize or adjust what was learned.

Related: Kaizen, Improvement register, Continual improvement
Kaizen

A philosophy of continuous, incremental improvement driven by the people doing the work, emphasizing small frequent changes rather than large one-off transformation projects.

Related: PDCA cycle, Continual improvement, Waste
Deming cycle

An alternative name for the plan-do-check-act cycle, emphasizing that quality improves through repeated, measured experimentation and feedback rather than one-time fixes.

Related: PDCA cycle, Kaizen, Metric
Lean

An improvement approach focused on maximizing customer value while minimizing waste, often using flow, pull, and continuous small improvement to raise efficiency and quality.

Related: Waste, Value stream mapping, Kaizen
Agile

A way of working that favors iterative delivery, cross-functional collaboration, and rapid feedback so that improvements can be adapted frequently to changing needs.

Related: Retrospective, PDCA cycle, Value stream
Retrospective

A structured team meeting held after a period of work to inspect what happened, identify what to keep or change, and agree on concrete improvements for the next iteration.

Related: Agile, Improvement register, Kaizen
Post-implementation review

A review conducted after a change or project is delivered to compare actual results with intended benefits, capture lessons, and decide on follow-up actions.

Related: Baseline, Outcome, Improvement register
Benchmarking

Comparing an organization's performance, practices, or maturity against internal references or external peers to identify gaps and generate improvement ideas.

Related: Maturity assessment, Baseline, Gap analysis
Maturity assessment

A structured evaluation of how well developed and consistently applied an organization's capabilities or practices are, often used to set improvement priorities and targets.

Related: Benchmarking, Baseline, Capability
Capability

The ability of an organization, person, or system to perform a particular activity or achieve a result, which improvement work may build, strengthen, or reorganize.

Related: Maturity assessment, Resource, Value stream
Resource

A person, tool, budget, information, or other asset consumed or used to carry out activities; improvement must consider whether resources are sufficient and well allocated.

Related: Capability, Constraint, Value stream
Constraint

Any factor that limits the performance of a system or value stream, such as capacity, policy, or skill shortages, and which improvement should identify and relieve.

Related: Theory of constraints, Waste, Value stream mapping
Theory of constraints

An improvement approach holding that a system's throughput is limited by its weakest link, so effort should focus on identifying and elevating that bottleneck before optimizing elsewhere.

Related: Constraint, Value stream mapping, Waste
Lead time

The total elapsed time from when a demand or request is received until it is fulfilled, a common measure of flow used to target improvement in value streams.

Related: Value stream mapping, Waste, Metric
Improvement backlog

An ordered list of pending improvement opportunities and actions, prioritized by value, risk, and effort, from which work is selected for execution.

Related: Improvement register, Prioritization, Retrospective
Prioritization

The process of ranking improvement opportunities by criteria such as benefit, urgency, risk, cost, and effort so that limited resources are applied where they matter most.

Related: Improvement backlog, Improvement register, Value
Embedding

The stage of making an improvement permanent by updating policies, procedures, training, measures, and behaviors so the new way of working becomes normal practice.

Related: ITIL continual improvement model, Organizational change management, Standardization
Standardization

Documenting and consistently applying an agreed way of working so that results are repeatable and can serve as a stable base for further improvement.

Related: Embedding, PDCA cycle, Baseline
Organizational change management

The practice of preparing, supporting, and guiding people through change so that new ways of working are adopted, sustained, and deliver the intended benefits.

Related: Embedding, Stakeholder, Capability
Stakeholder

A person or group with an interest in, influence over, or exposure to an improvement, whose needs and engagement must be considered for the change to succeed.

Related: Organizational change management, Value, Outcome
Governance

The means by which an organization is directed and controlled, including decision rights, oversight, and accountability that shape how improvement is authorized and resourced.

Related: Prioritization, Resource, Capability
Service value chain

An operating model of six connected activities (plan, improve, engage, design and transition, obtain or build, deliver and support) through which value is created; the improve activity is continual improvement's home.

Related: Value stream, Continual improvement, Value
Guiding principles

A set of recommendations that guide behavior in any circumstances, such as focus on value, start where you are, progress iteratively with feedback, and collaborate and promote visibility.

Related: Continual improvement, Value, ITIL continual improvement model
Continual improvement practice

The ITIL 4 practice whose purpose is to align the organization's practices and services with changing business needs through the ongoing identification and improvement of services, components, and practices.

Related: Continual improvement, Improvement register, Service value chain