Are you referring to a Job Order:
Job Order Contracting (JOC) is a way for organizations to get numerous, commonly encountered construction projects done quickly and easily through multi-year contracts. JOC reduces unnecessary levels of engineering, design, and contract procurement time along with construction project procurement costs by awarding long-term contracts for a wide variety of renovation, repair and construction projects.
With an emphasis on partnering and team work between owners and contractors, JOC provides the methodology to execute a wide variety of indefinite delivery, indefinite quantity, fixed price, multiple simultaneous orders for renovation, rehabilitation and repair work for large facilities and infrastructures.
Change Order:
Change Order--A document recommended by Engineer which is signed by Contractor and Owner and authorizes an addition, deletion, or revision in the Work or an adjustment in the Contract Price or the Contract Times, issued on or after the Effective Date of the Agreement.
Standard General Conditions
Work Order:
A work order or job order (sometimes job ticket or work ticket, as it often has some type of ticket attached) is an order received by an organization from a customer or client, or an order created internally within the organization. A work order may be for products or services.