Constraints, or limitations, refer to the restrictions that affect the ability to achieve certain goals or outcomes. These can arise from various sources, such as resources, time, or regulations. For example, a project may be limited by a tight budget, which restricts the materials that can be used or the number of people who can be hired. In research, constraints can impact the scope and depth of a study. Factors like sample size, access to data, and ethical considerations can limit the findings. Understanding these constraints is essential for accurately interpreting results and making informed decisions in fields like science, business, or policy-making.