The project manager should take the action of delivering business value as soon as possible as a priority. This is because the project is aimed at increasing the commercial value of the product in a highly competitive market, which means that the project needs to deliver a viable solution that meets the customer needs and expectations quickly and effectively. By delivering business value as soon as possible, the project manager can also obtain early feedback, validate the assumptions and requirements, and make adjustments as needed. This will help to improve the quality, performance, and satisfaction of the product, and to reduce the risk of waste, rework, and delays. The other options are not as important or relevant as delivering business value as soon as possible. Emphasizing the use of Kanban methodology may be helpful, but it is not a priority action, as it is a tool or technique, not a goal or outcome. Kanban is a visual system that helps to manage the flow of work and limit the work in progress, but it does not guarantee the delivery of business value. Ensuring the project sponsor is aware of the go-to market date is a good practice, but it is not a priority action, as it is a communication or reporting activity, not a delivery or execution activity. The go-to market date may also change depending on the feedback and changes in the market. Implementing a plan-do-check-act (PDCA) cycle is a useful approach, but it is not a priority action, as it is a process or framework, not a result or benefit. The PDCA cycle is a method for continuous improvement that involves planning, doing, checking, and acting on the results, but it does not specify what business value to deliver or how to deliver it. References: PMBOK Guide, 6th edition, Chapter 1.2.6, 4.1.3, 5.1.3, Agile Practice Guide, 1st edition, Chapter 2.2.1, 2.3.1
