Iterations and feedback is a critical concept in agile methodologies that involves repeated cycles of development, testing, and feedback. Each iteration is a self-contained cycle that produces a working version of a product. Feedback is collected at the end of each iteration from both customers and team members, helping inform improvements for the next cycle. This efficient feedback loop allows teams to rapidly respond to change and incrementally improve upon their product with each iteration.

CI/CD stands for Continuous Integration and Continuous Delivery, which is a modern software development practice to routinely integrate code changes into a shared repository. Automated build-and-test steps validate this integration, followed by automated delivery ready to be released into production. This practice allows teams to detect and fix problems early, reduce overheads, and rapidly deliver reliable products. It's a key practice in DevOps culture, enabling teams to achieve their continuous improvement goals.

The 'Inspect and Adapt' concept is one of the pillars of the Agile manifesto. This concept entails regularly scrutinizing the work process and the product created, and then making necessary alterations for improvement. In an Agile environment, 'Inspect and Adapt' events are held at the end of every iteration or sprint, where team members reflect on the past sprint, identify areas for improvement, and plan actions for implementing these improvements in the next sprint. This approach is crucial for continuous improvement and maintaining product quality.

Value Stream Mapping (VSM) is a lean-management method for examining the current state and designing a future state for the series of events that take a product or service from its start through to the customer. In Agile, VSM is a powerful tool for identifying waste, redundancy, and unnecessary complexity. It helps the team visualize the value flow, and then optimize the flow reducing or eliminating anything that doesn't add value. VSM is key in helping teams improve in a way consistent with Agile principles.

Retrospectives in Agile methodology are meetings held at the end of each sprint to reflect on the process and identify opportunities for improvement for the next sprint. The team discusses the work that happened, the issues they faced, and what steps can be taken to resolve those issues. Agile retrospectives play a crucial role in driving the continuous improvement process, providing a dedicated time and space for teams to reflect, learn and improve.

The 'Gemba Walk' is a practice derived from the Japanese business philosophy of 'Gemba', which means 'the real place'. In business, Gemba refers to the place where value-creating work happens, such as the factory floor or development team area. In the context of Agile, a Gemba Walk represents the act of going to see the actual process, understand the work, ask questions, and learn. It's an effective tool to gain insight into potential areas for improvement by observing how teams work in their environment and helps foster a culture of continuous improvement.

Relentless improvement is a principle underpinning many Agile frameworks, embodying the notion of constantly striving for better. It’s about promoting a culture where teams relentlessly question the status quo and execute a cycle of constant inspections and adaptations. This includes revisiting products, processes, tools, strategies, structures, and even, the way teams learn. By actioning experimentation, learning from both failures and successes, and integrating the learned knowledge into the process, Agile teams can achieve higher levels of performance and productivity.

Built-in Quality is an Agile concept that stresses the importance of maintaining quality from the start of a project, rather than adding it in later. It encourages teams to create products that are consistently high-quality within each iteration, minimizing the need for substantial revisions or improvements at a later date. With multiple checks integrated into various stages of the development process, the chances of delivering flawless output increases, making Continuous Improvement a ceaseless activity.

Scrum of Scrums (SoS) is a scale-up technique to foster continuous improvement in larger Agile projects. It involves a collection of multiple Scrum teams that interconnect and collaborate to deliver complex solutions. The SoS organization promotes constant communication, collaboration, and transparency, fueling continuous improvement across these teams. This approach ensures that issues are quickly identified, shared insights are harnessed for common benefit, and established improvements are applied across the organization.

The PDSA cycle, developed by Dr. William Edwards Deming, is an iterative four-step management method for controlling and continuous improvement of products and processes. The steps are: Plan (identify a goal or purpose), Do (execute the planned changes on a small scale), Study (analyse the results), and Act (if successful, implement the changes on a larger scale and continually assess results). This serves to promote alignment between the plans and actions of a team, and aids alignment with the overall strategy of the business.

The 'Five Whys' is a questioning technique used to explore the cause-and-effect relationships underlying a problem. The primary goal of the technique is to determine the root cause of a problem by asking a minimum of 'why' five times. It promotes deep thinking and quickly uncovers layers that underlie a problem. Within agile settings, it encourages teams to avoid making assumptions and tells them to rely on actual facts, leading to optimal solutions and continuous process enhancements.

Lean Software Development is an iterative agile methodology originally developed by Mary and Tom Poppendieck. It focuses on delivering value to the customer and on the efficiency of the 'value stream', which is the mechanism that adds that value. It's about minimizing waste, creating quality products, and being adaptable to change. A critical component of Lean Software Development is continuous improvement, which gets ingrained in the software development lifecycle, ultimately leading to improved efficiency, quality, and customer satisfaction.