The best way to help the two teams that are continually dependent on each other to manage their work is to ensure the appropriate representatives from both teams are present during Cross-Team Refinement. Cross-Team Refinement is an optional event in Nexus that allows the Scrum Teams to collaborate and coordinate on the Product Backlog items that have dependencies or require integration 11. By having the representatives from both teams present during this event, they can identify and resolve the dependencies, clarify the requirements, align the expectations, and plan the work for the next Sprint. This will improve the transparency, the quality, and the value of the Integrated Increment.

The other options are not advisable for the following reasons:

The Nexus Integration Team should not be responsible for integrating the work of these two Scrum Teams, as this would create a bottleneck and a hand-off. The Nexus Integration Team is a specialized Scrum Team that provides services and guidance to the Scrum Teams in the Nexus to ensure that the Integrated Increment is produced every Sprint 11. However, the Nexus Integration Team is not accountable for the integration of the work of the individual Scrum Teams, as this is the responsibility of the Scrum Teams themselves 22.

Reorganizing these two Scrum Teams so that one is responsible for development and one is responsible for integration is not a good idea, as this would create a silo and a separation of concerns. The Scrum Teams in a Nexus should be cross-functional and self-organizing, meaning that they have all the skills and abilities to deliver a potentially releasable product Increment every Sprint 11. Separating the development and the integration tasks would compromise the collaboration, the feedback, and the agility of the Scrum Teams.

Merging the two Scrum Teams together is not a viable solution, as this would create a large and unwieldy team. The Scrum Guide states that the optimal size of a Scrum Team is between three and nine members 33. Merging two Scrum Teams together would exceed this limit and create challenges in communication, coordination, and decision-making. Moreover, merging the two teams would not necessarily eliminate the dependencies, as they may still exist within the larger team or with other teams in the Nexus.

The purpose of Nexus Sprint Retrospective is all of the above, meaning that it aims to:

Plan ways to increase quality and effectiveness across the whole Nexus. The Nexus Sprint Retrospective is a formal opportunity for a Nexus to inspect and adapt itself and create a plan for improvements to be enacted during the next Sprint to ensure continuous improvement 11.

To inspect how the last Sprint went with regards to individuals, teams, interactions, processes, tools, and its Definition of Done. The Nexus Sprint Retrospective follows the same format and principles as the Scrum Team Sprint Retrospective, but at a larger scale. The Nexus inspects the aspects of the product development that affect the Nexus as a whole, such as the collaboration, the integration, the dependencies, the quality, and the value 22.

To complement the Scrum Teams' Sprint Retrospectives by using bottom-up intelligence to focus on issues that affect the Nexus as a whole. The Nexus Sprint Retrospective does not replace the Scrum Teams' Sprint Retrospectives, but rather enhances them by using the input and output from the individual teams to identify and address the shared challenges and opportunities 33.

The Nexus framework is a way of scaling Scrum for multiple teams working on a single product. The Nexus framework uses Scrum as its building block and extends it only where necessary to minimize and manage dependencies between teams 11. The Nexus framework defines the accountabilities, events, and artifacts that bind and weave together the work of the teams in a Nexus 11. One of the key artifacts in the Nexus framework is the Integrated Increment, which is the integrated aggregation of all work completed by all the Scrum Teams in a Nexus 112.

When multiple Scrum Teams work on a product at the same time, the statements that are true are:

The different Scrum Teams coordinate their work to deliver a single Increment. This is answer A. This is a valid answer because the different Scrum Teams in a Nexus are not working in isolation, but rather collaborating and coordinating their work to deliver a single Increment 113. The single Increment is the Integrated Increment, which is the sum of all the work done by the Scrum Teams in a Sprint that meets the Definition of Done 112. The single Increment is the potentially releasable outcome of the Sprint, which means it meets the quality standards and expectations of the stakeholders 112.

The Developers must integrate their work before the end of the Sprint. This is answer C. This is a valid answer because the Developers are the people who do the work of delivering a potentially releasable Increment of product value in each Sprint 114. The Developers must integrate their work before the end of the Sprint, which means they must combine and verify their work frequently and continuously throughout the Sprint 114. The integration of the work is essential for ensuring the quality and usability of the product, as well as for validating the assumptions and learning from the feedback 114.

The other three answers are not correct because:

Each Scrum Team develops one or more product components which the Nexus Integration team uses to assemble the Integrated Increment. This is answer B. This is not a valid answer because the Nexus Integration Team is not the one who assembles the Integrated Increment. The Nexus Integration Team is a role that consists of the Scrum Master, the Product Owner, and other members who are responsible for coordinating, coaching, and supervising the integration of the work done by the Scrum Teams in the Nexus 11[5]. The Nexus Integration Team facilitates the integration of the work, but does not do it for the teams 11[5]. The teams are responsible for integrating their own work and delivering a potentially releasable Increment of product value in each Sprint 11[5].

They are all on the same Scrum Team. This is answer D. This is not a valid answer because they are not all on the same Scrum Team. A Scrum Team is a small group of people who are cross-functional and self-organizing, and who deliver a potentially releasable Increment of product value in each Sprint 11[6]. A Scrum Team usually consists of one Scrum Master, one Product Owner, and a few Developers 11[6]. When multiple Scrum Teams work on a product at the same time, they are not on the same Scrum Team, but rather on different Scrum Teams that form a Nexus 11[6]. A Nexus is a group of three to nine Scrum Teams who work on a single product and who share a common Product Backlog, a common Definition of Done, and a common Sprint Goal 11[6].

The Scrum of Scrums assembles the components into an Integrated Increment. This is answer E. This is not a valid answer because the Scrum of Scrums is not a part of the Nexus framework. The Scrum of Scrums is a term that is sometimes used to describe a coordination mechanism for multiple Scrum Teams, where representatives from each team meet regularly to share information and align their work [7][7]. The Scrum of Scrums is not a formal event or role in Scrum or Nexus, and it is not the one who assembles the components into an Integrated Increment [7][7]. The teams are responsible for integrating their own work and delivering a potentially releasable Increment of product value in each Sprint 11[5].

The Definition of Done is a set of quality standards that apply to the Integrated Increment, which is the combined work of all the Scrum Teams in the Nexus that meets the Nexus Sprint Goal 11. The Definition of Done creates transparency and alignment among the Scrum Teams and the stakeholders, and ensures that the Integrated Increment is potentially releasable 22. The Definition of Done can evolve over time as the Nexus learns from its experience and feedback, and as the product complexity and quality expectations change 33. The best place to discuss and update the Definition of Done is at the Nexus Sprint Retrospective, which is an event that occurs at the end of the Sprint where the Nexus inspects and adapts its processes, tools, and interactions 11. The Nexus Integration Team, which is a group of people who are accountable for ensuring the integration and delivery of the Integrated Increment, is responsible for the Definition of Done, but they can involve the other Scrum Team members and stakeholders in the discussion and decision 1144. Therefore, statement C is the correct answer.

Statement A is incorrect because it implies that the Nexus Integration Team can unilaterally change the Definition of Done without consulting the other Scrum Teams or stakeholders, which would undermine the transparency and collaboration that are essential for scaling Scrum 1144. Statement B is incorrect because it suggests that the Definition of Done is owned by the larger development organization, which may not be familiar with the specific needs and challenges of the Nexus, and that the changes are communicated by stakeholders, who may not have the technical expertise or authority to do so 1144. Statement D is incorrect because it assumes that the Scrum Masters have the sole power to decide on changes to the Definition of Done, which would exclude the input and agreement of the Nexus Integration Team, the other Scrum Team members, and the stakeholders 1144.

The best answer for this question is A. Integrating more frequently. This answer is correct because integrating more frequently can help the Scrum Teams in a Nexus to detect and resolve integration issues or dependencies earlier and faster, and to deliver a potentially releasable product increment at the end of each Sprint. Integrating more frequently can also reduce the complexity and risk of integration, and increase the quality and feedback of value delivery 112233.

The other answers are not correct for the following reasons:

B . Doing more acceptance testing. This answer is not sufficient because doing more acceptance testing does not address the root cause of the problem, which is the late integration of the work. Acceptance testing can help to verify the quality and functionality of the product increment, but it does not ensure that the integration is done early and often. Moreover, doing more acceptance testing may consume more time and resources, and delay the delivery of the product increment 44.

C . Doing more exploratory testing. This answer is not helpful because doing more exploratory testing does not solve the issue of the late integration of the work. Exploratory testing can help to discover and learn more about the product increment, but it does not guarantee that the integration is done smoothly and quickly. Furthermore, doing more exploratory testing may introduce more uncertainty and variability, and hinder the delivery of the product increment 55.

D . Using Behavior-Driven Development. This answer is not relevant because using Behavior-Driven Development does not directly affect the integration of the work. Behavior-Driven Development is a technique that can help to define and communicate the expected behavior and outcomes of the product increment, but it does not ensure that the integration is done frequently and effectively. Additionally, using Behavior-Driven Development may require more collaboration and coordination, and complicate the delivery of the product increment [6].

E . Investing in more Requirements Traceability. This answer is not useful because investing in more Requirements Traceability does not improve the integration of the work. Requirements Traceability is a practice that can help to track and document the origin and evolution of the product requirements, but it does not ensure that the integration is done timely and efficiently. Also, investing in more Requirements Traceability may increase the overhead and bureaucracy, and slow down the delivery of the product increment [7].

F . All of the above. This answer is not correct because none of the above answers are effective for addressing the issue of the late integration of the work. As explained above, each of the above answers has its own limitations and drawbacks, and does not directly or sufficiently help the Scrum Teams in a Nexus to integrate their work more frequently and successfully. Therefore, the best answer is A. Integrating more frequently.