Activity An operation on a network which takes time (or other resources) and is indicated by an arrow.
Actual cost of work performed (ACWP) Cumulative actual cost (in money or man-hours) of work booked in a specific period.
Actual hours The man-hours actually expended on an activity or contract over a defined period.
Adjudication Procedure for resolving a dispute by appointing an independent adjudicator.
Advance payment bond Bond given in return for advanced payment by client.
Analytical estimates Accurate estimate based on build-up of all material and labour requirements of the project.
AoA Activity on arrow.
AoN Activity on node.
Arbitration Dispute resolution by asking an arbitrator to make a decision.