Measurement is the process of assigning numbers or symbols to objects to characterize and quantify them. It involves observing and collecting quantifiable data about characteristics. Assessment is a broader process of collecting data through tests and observations to understand a topic or individual's condition. The purpose is to evaluate achievement against objectives. Evaluation is the process of making judgements about the value or worth of performance by establishing objectives, selecting indicators, and comparing data to objectives. It determines the outcomes of learning. The key differences are that measurement quantifies observable phenomena, assessment collects evidence of achievement, and evaluation makes qualitative judgements on performance and outcomes.