In a baseline dimensioning system, how are dimensions placed?

In a baseline dimensioning system, dimensions are placed from a datum point, which serves as a reference from which all other measurements are taken. This method is effective because it establishes a consistent starting point for dimensioning, making the dimensions more organized and easier to interpret. By using a datum point, engineers and designers can ensure that the measurements remain clear and unambiguous, facilitating better accuracy in the construction or manufacturing of a part.

This approach minimizes potential confusion that can arise from differing reference points, as it allows all dimensions to relate back to a single, defined point. This is particularly important in engineering contexts where precision is crucial, as it helps to maintain the relationships between various features of a design.

The other choices refer to methods that may not provide the same level of clarity or precision in dimensioning. For instance, measuring from feature to feature can lead to cumulative tolerance issues, while visual preferences can introduce subjectivity. Using multiple reference points can complicate dimensions, making it harder to understand the size and placement of features relative to each other.