Any restrictions which the project must work within. Typically these are restrictions of time, budget and resources.

A factor which limits the achievement of an objective, e.g. the potential size of an activity will be limited by such constraints as the amount of land, labour, machinery, etc., that are available. See key constraint.

externally imposed boundaries on options the designer may encounter

applicable restrictions that will affect the scope of the project or the sequence of project activities.

Constraints are factors that will limit the project manager's options. For example, a predefined budget is a constraint that is highly likely to limit your options regarding scope, staffing, and schedule. When a project is performed under contract, contractual provisions will generally be constraints.

Restrictions or boundaries impact ing overall capability, priority, and resources. [D02290] DSMC A generic term for factor affect ing the possible start and finish date s of an activity including logic and imposed date [D03816] PNG

physical and operational limitation in the transfer of electrical power through transmission facilities

Factors limiting the project leadership's options, at the project, task, or sub-task level.

Constraints are limitations that are outside the control of the project team and need to be managed around. They are not necessarily problems and they are not necessarily even risks. However, the project manager should be aware of constraints because they refer to limitations that the project must execute within. Date constraints, for instance, imply that certain events (perhaps the end of the project) must occur by certain dates. Resources are almost always a constraint since they are not available in an unlimited supply. For instance, once your project budget is set, it becomes a constraint that the project must live within.

Factors that must be taken into account when solving an information problem. Typically these factors are classified as economic, for example, budget available to create an information product; technical, for example, availability, capabilities and limitations of equipment; social, for example, culture, ethnicity, age, location, education, special needs and status of end-users; operational, for example, the requirement to use specific techniques and procedures.

Performance requirements imposed on the design, usually in the form of max allowable delay, or required operating frequency.

Restrictions set on the start or finish date of a task. You can specify that a task must start on or finish no later than a particular date. Constraints can be flexible ( not tied to a specific date) or inflexible (tied to a specific date) Flexible constraints such as As Soon As Possible (ASAP) and As Late As Possible (ALAP) do not have specific dates associated with them. Setting these constraints allows you to start tasks as early as possible or as late as possible with the task ending before the project finish, given other constraints and task dependencies in the schedule. Inflexible constraints such as Must Start On (MSO) and Must Finish On (MFO) require an associated date, which controls the start or finish date of the task. These constraints are useful when you need to make your schedule take into account external factors, such as the availability of equipment or resources, deadlines, contract milestones, and start and finish dates.

Limits imposed on a model. For example, in an interaction model, specifying that the number of trips generated from an origin to all destinations cannot exceed the origin's production capacity.

Factors that will limit the project management team options.

Factors which will limit the project management team's options. (PMI)

Limits or restrictions imposed on a portfolio manager in relation to stocks, sectors or markets.