When many Scrum Teams are working on the same product, should all of their Increments be integrated every Sprint?
Answer: B
A. Incorrect. All Increments from all Scrum Teams working on the same product must be integrated every Sprint, regardless of perceived dependencies. Even if teams believe their work has no cross-team dependencies, unforeseen integration conflicts, performance issues, or functional gaps often emerge only when full integration is performed. Partial integration of only dependent teams' work leads to an incomplete, untested product state that does not meet the requirement for a potentially releasable Increment.
B. Correct. This aligns with the empirical Scrum pillar of Inspection. The Product Owner is accountable for maximizing product value, which requires accurate, real-time visibility into the complete functional state of the product every Sprint. Without full integration of all Increments, the Product Owner and stakeholders cannot reliably assess if the combined work of all teams meets quality standards, delivers intended value, or is suitable for release, leading to flawed adaptation decisions.
C. Incorrect. While individual Scrum Teams are self-managing and cross-functional, teams working on the same shared product are part of a unified product delivery group and do not operate in isolation. Their work contributes to a single shared product Increment, so integration of all team outputs is required to deliver a cohesive, usable product every Sprint.
D. Incorrect. Scrum does not support the use of hardening Sprints, as all work required to deliver a usable, potentially releasable Increment must be completed within every regular Sprint. Hardening Sprints introduce undone work, break the regular cadence of inspection and adaptation, and violate the core Scrum requirement that each Sprint delivers a usable Increment. Integration work is part of the work required to meet the product's Definition of Done, so it must be completed every Sprint, not deferred to a separate hardening Sprint. Key Concepts:
1. Potentially Releasable Increment: A core Scrum artifact, the Increment is a concrete, usable stepping stone toward the Product Goal. For multiple teams working on one product, all team outputs must be integrated into a single Increment that meets the shared Definition of Done every Sprint, so it can be released at the Product Owner's discretion.
2. Empirical Process Control (Inspection Pillar): Scrum is based on empiricism, which asserts that knowledge comes from experience and decisions are made based on what is observed. Regular, accurate inspection of the Increment ensures that teams and stakeholders can identify gaps or defects early, and adapt their plans appropriately. Without full integration of all Increments, inspection of the actual product state is impossible.
3. Scaled Scrum Requirements: When scaling Scrum for multiple teams on a single product, all core Scrum rules still apply. The Nexus Guide, the official Scrum scaling framework for multiple teams on one product, explicitly requires a single integrated Increment across all teams every Sprint to maintain transparency and support valid inspection. References:
Scrum Guide 2020, https://scrumguides.org/scrum-guide.html
Nexus Guide 2024