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    Project management glossary: key terms and definitions

    Portfolio management, Stage-Gate, PMO, capacity and more

    Clear, practical definitions of the terms used in project, portfolio and Stage-Gate management. Use the filters or the A–Z bar to find a term. Each entry links to an in-depth guide.

    A

    Agile vs waterfall

    Waterfall delivers a project in sequential phases, each completed before the next begins, with scope fixed early. Agile delivers in short iterations, adapting scope based on feedback. Many organisations combine both: gated governance at portfolio level, agile delivery within teams.

    Related: Project life cycle, Stage-Gate process

    See enterprise project execution

    B

    C

    Capacity planning

    Capacity planning compares the work an organisation wants to take on with the people and skills it has available over a given period. It shows in advance where demand will exceed capacity, so that projects can be re-prioritised, rescheduled or staffed before bottlenecks appear.

    Related: Resource management, Capacity vs workload

    See resource capacity planning

    Capacity vs workload

    Capacity management decides how much work an organisation can realistically commit to, before work is approved. Workload management balances work that is already underway across people and teams. Capacity sets the limit; workload management operates within it.

    Related: Capacity planning, Workload management

    Read capacity vs workload management

    Capital expenditure (CAPEX)

    Capital expenditure (CAPEX) is money spent to acquire, build or upgrade long-term assets such as plants, equipment or infrastructure. CAPEX projects usually need a formal business case and approval before funds are released.

    Related: Capital project, Business case

    See CAPEX and investment control

    Change management

    Change management in project management is the structured approach to handling changes to a project's scope, objectives, timeline or deliverables, and to helping the people affected accept and adopt them. Done well, it reduces resistance and keeps changes controlled and documented.

    Related: Stakeholder, Project scope

    Read the change management guide

    D

    E

    G

    Gantt chart

    A Gantt chart is a bar chart that shows a project schedule over time: each task is a bar spanning its start and end dates, with dependencies and milestones marked. It is the most common way to visualise a project plan.

    Related: Project scheduling, Milestone

    Read the project scheduling guide

    Gate review

    A gate review is a formal checkpoint between two stages of a project where gatekeepers assess its progress, risks and business case against agreed criteria. The outcome is a decision: continue, rework, hold or stop.

    Related: Gatekeeper, Go / kill decision

    Get the gate review checklist

    Gatekeeper

    A gatekeeper is a senior decision-maker who reviews a project at a gate and decides whether it continues, is reworked or is stopped. Gatekeepers judge the project against agreed criteria and commit the resources needed for the next stage.

    Related: Gate review, Steering committee

    Read the Stage-Gate guide

    Go / kill decision

    A go / kill decision is the choice made at a gate to continue funding a project or stop it. Stopping weak projects early frees budget and people for stronger ones, which is a core purpose of gated governance.

    Related: Gate review, Portfolio governance

    Read the Stage-Gate guide

    I

    M

    N

    New product development (NPD)

    New product development (NPD) is the end-to-end process of turning an idea into a product on the market, from ideation and business case through design, testing and launch. Many organisations manage NPD with a gated process to control risk and investment.

    Related: Stage-Gate process, Product launch

    Read the NPD guide

    P

    Project life cycle

    The project life cycle is the sequence of phases a project passes through from start to finish, commonly initiation, planning, execution, monitoring and control, and closure. Gated processes add formal decision points between phases.

    Related: Stage-Gate process, Milestone

    Read the project plan guide

    Project management office (PMO)

    A project management office (PMO) is a team that sets project standards, supports project managers and provides oversight and reporting across projects. PMOs range from supportive, which offers templates and coaching, to directive, which manages projects directly.

    Related: Portfolio governance, Executive reporting

    Read the PMO guide

    Project plan

    A project plan is the approved document or model that sets out how a project will be delivered: scope, schedule, budget, resources, risks, communication and governance. It is the baseline against which progress is measured.

    Related: Project scheduling, Project scope

    Read the project plan guide

    Project workflow

    A project workflow is the defined sequence of steps, approvals and hand-offs that a task, document or request follows, such as review, sign-off and release. Standard workflows make work repeatable and auditable.

    Related: Gate review, Compliance

    Read the project workflow guide

    R

    Return on investment (ROI)

    Return on investment (ROI) measures the gain from an investment relative to its cost, usually as a percentage: (benefit − cost) ÷ cost. It is used to compare projects and to check whether an investment delivered what its business case promised.

    Related: Business case, Project cost tracking

    Try the ROI calculator

    S

    Stage-Gate process

    The Stage-Gate® process is a method for moving a project, typically a new product, from idea to launch through a series of stages separated by decision points called gates. At each gate, decision-makers review the evidence and decide whether to invest further. The model was developed by Robert G. Cooper.

    Related: Gate review, Gatekeeper, Go / kill decision

    Read the Stage-Gate guide

    Stage-Gate software

    Stage-Gate software is a tool that supports a gated project process: it defines stages and gates, collects deliverables, routes gate reviews to decision-makers and records decisions. It replaces gate packs assembled by hand in documents and spreadsheets.

    Related: Stage-Gate process, Gate review

    See Stage-Gate process software

    Stakeholder

    A stakeholder is any person or group affected by a project or able to influence it, such as sponsors, users, team members, customers or regulators. Identifying and managing stakeholders early reduces resistance and surprises.

    Related: Steering committee, Change management

    Read about stakeholders

    Steering committee

    A steering committee is a group of senior stakeholders who give a project or programme strategic direction, approve major decisions and resolve escalated issues. It meets at set intervals and holds the project manager accountable for delivery.

    Related: Portfolio governance, Stakeholder

    Read about steering committees

    W

    Work breakdown structure (WBS)

    A work breakdown structure (WBS) is a hierarchical breakdown of a project's total scope into smaller, manageable deliverables and work packages. It is the basis for estimating, scheduling and assigning work.

    Related: Project scope, Project plan

    Read how to define project scope

    Workload management

    Workload management is the ongoing balancing of work that is already underway across individuals and teams, so that effort is spread realistically and deadlines stay achievable. It can redistribute work but cannot reduce what has already been committed.

    Related: Capacity vs workload, Resource allocation

    Read about workload management

    See these concepts in one place

    Cerri Project brings portfolio, Stage-Gate, capacity and CAPEX governance together.

    Explore the software

    Stage-Gate® is a registered trademark of Stage-Gate Inc.