Which of the following is an example of a quality control measure?

Conducting inspections and testing materials is a fundamental quality control measure because it directly assesses the quality of the materials being used in a project and ensures they meet specified standards and requirements. Quality control is essential in construction and other industries to maintain the integrity of the final product and prevent defects or failures. Inspections can identify issues early in the process, allowing for timely corrections, and testing materials ensures they are fit for their intended use according to safety and performance criteria.

In contrast, creating motivational posters for workers primarily serves to boost morale and enhance motivation, but it does not contribute directly to the quality of the product or service. Similarly, scheduling more team meetings may improve communication or planning but does not inherently address quality control processes. Increasing working hours could potentially lead to fatigue and errors, which might adversely affect quality rather than ensure it. Therefore, inspections and testing are the most relevant actions that actively contribute to maintaining and improving quality in a project.