The INVEST principle is a practice/framework to follow when creating user stories. INVEST stands for independent, negotiable, valuable, estimatable, small, and testable.

XP practices are more central to the way that work is done compared to traditional projects. XP aims to deliver stable, working software, predictably.

A scrum master serves a team by coaching team members to understand agile and scrum values, principles, and practices.

BDD is a model where collaboration among the designers, builders, and testers is always at the forefront.

The DORA group outlines specific metrics to track and work towards in order to get the most out of your product.

Site reliability engineering (SRE) is a software management approach that seeks to bridge the gap between development and operations teams.

Mean time to repair (MTTR) measures the time required to identify a product failure and bring the product to its normal operating status.

The four components (quadrants) of an Ansoff matrix serve to help with making trade-off decisions: market penetration, market development, product development, and product/market diversification.