# PMP Vocabulary

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Terms in this set (280)
An activity is a task that must be performed in order to complete work on the project. Activities are created by further decomposing work packages. The primary difference between a work package and an activity is that a work package is a component of the scope and describes some aspect of the deliverable, while an activity describes the work that must be done in order to complete the work package.
The monitoring and controlling process performed by the buyer to ensure compliance by the seller or other party. Administer Procurements compares performance against terms and conditions specified in the contract to make certain that the seller meets his or her contractual obligations. The seller's performance is typically rated or evaluated by the buyer and is communicated back to the seller.
Costs that are allowed under the terms of the contract. Typically, allowable costs become relevant under certain types of cost-reimbursable contracts where the buyer reimburses the seller's allowable costs. If there are non-allowable costs in a contract, the buyer is not obligated to reimburse the seller for these.