JOB ORDER in Microsoft Dynamics NAV 5.0

is there any module pertaining to job order for microsoft dynamics nav 5.0? can’t seem to find it. not even sure if i entered on the right forum site (supply chain management and manufacturing forum). a concrete example is if a user wants to monitor the jobs or activities performed. this may sound foolish but a resolution i come up is use the purchase order since this is a purchase of a service. i chose the type G/L Account and click repairs and maintenance for example. please help.

thanks in advance.