What is SAP ASAP methodology?

ASAP (Accelerated SAP) was SAP's original, structured implementation methodology for rolling out SAP systems, organized into defined sequential phases: Project Preparation, Business Blueprint, Realization, Final Preparation, and Go-Live & Support — a Waterfall-influenced structure reflecting the traditional, on-premise SAP implementation projects it was designed for.

flowchart LR
    A[Project Preparation] --> B[Business Blueprint]
    B --> C[Realization]
    C --> D[Final Preparation]
    D --> E[Go-Live and Support]

ASAP has since been succeeded by SAP Activate, the current methodology used for S/4HANA implementations, which incorporates more iterative, Agile-influenced phases (notably Explore and Realize) rather than ASAP's more strictly sequential structure. For a beginner, understanding ASAP's phase structure is still useful groundwork, since Activate's phases map conceptually onto similar underlying project stages, just executed with more iteration built in.