Schedule detail and logic affect what a schedule can show. Constraints and duration assumptions affect the calculation. A limitation in one area is assessed for its significance to the question; it does not make the rest of the project record disappear.
Working calendars, seasonal conditions, weather assumptions and exposed work may affect planned durations and the meaning of a schedule forecast. Their significance depends on the project facts, records and administration of schedule submissions and reviews.
The level of detail, resource assumptions, access conditions and available production information affect how a schedule represents the work. Those considerations are evaluated in the project context rather than by a single prescribed level of detail or production source.
Constraints can affect calculated dates, float and critical-path results. Analysts may consider their purpose, placement and effects in relation to the project, contract and selected analytical approach.