Agile & Lean (team level)

• Scrum — Time-boxed sprints, fixed roles, lightweight artifacts.
• Kanban — Flow-based, WIP limits, continuous delivery.
• Scrumban — Hybrid of Scrum cadence with Kanban flow.
• Extreme Programming (XP) — Engineering practices (TDD, pair programming) + short iterations.
• Lean — Eliminate waste, optimize flow and learning.
• Crystal — Tailor rigor to team size/criticality.
• Feature-Driven Development (FDD) — Model & build by features.
• DSDM / AgilePM — Time-boxed delivery with strong business ownership.

Scaling Agile (multi-team / enterprise)

• SAFe (Scaled Agile Framework) — Portfolio→Program→Team layers, lean governance.
• LeSS (Large-Scale Scrum) — Keep Scrum minimal; scale by descaling org.
• Scrum@Scale — Fractal Scrum networks (SoS / Meta-Scrum).
• Nexus — Scrum with integration focus for 3–9 teams.
• Disciplined Agile (DA) — Toolkit to choose your WoW (way of working).

Predictive / Plan-driven

• PRINCE2 — Process-based, stage gates, business case-driven.
• Waterfall — Sequential phases; heavy up-front planning.
• V-Model — Verification/validation mapped to development stages.
• Stage-Gate (Phase-Gate) — Idea→Launch pipeline with go/kill gates.
• PERT / Critical Path Method (CPM) — Network scheduling & durations focus.
• Critical Chain (CCPM) — Resource-constrained schedules with buffers.

Hybrid & Governance blends

• PRINCE2 Agile — PRINCE2 controls + Agile delivery at team level.
• Hybrid Agile-Waterfall — Agile for build, predictive for compliance/contract.
• AgilePM (DSDM) — Often used to bridge governance with agile teams.

Quality, process & improvement (often combined with above)

• Six Sigma (DMAIC / DMADV) — Defect reduction/statistical control.
• Lean Six Sigma — Lean flow + Six Sigma quality.
• Kaizen — Continuous, incremental improvement.

High-uncertainty / R&D heavy

• Spiral — Risk-driven iterative cycles.
• Incremental/Iterative SDLC — Deliver in slices; refine with feedback.
• Event Chain Methodology — Manage schedule risk via event chains.

Program/Portfolio (related, for bigger scope)

• MSP (Managing Successful Programmes) — Benefits-led program mgmt.
• MoP / P3O — Portfolio selection & PMO structures (UK best-practice).
• OPM / PfM (PMI) — Organizational/portfolio standards used with methods.

Standards & bodies of knowledge (not “methods” but commonly used)

• PMBOK Guide / PMI — Process groups/knowledge areas; tailoring guidance.
• ISO 21502 — International guidance for project management.
• IPMA ICB — Competence framework for PM roles.