Workorder WMATL APPR INPRG status

The Work Order statuses in Maximo are defined as standard values, but it is mostly configured as per client's business.

WAPPR[Waiting for Approval] 

  It is an initial status where the work order is planned. It allows setting job plans and work plans. It does not allow entering actual information.

APPR [Approved] 
  It is used for Work orders approved to be started, but it has not started yet. 
Sometimes, it may be waiting for a labor, which has prevented this work from being started. It is for this reason, we could able to change WO status from APPR to WAPPR.

WMATL [Waiting for Material]

  It is equivalent of APPR status, but it may be waiting for a material to start the work. When a PM-generated Work Order is changed to APPROVED status, and if those materials are still not available, then the TASK Work Order(s) will get a status of WMATL while the main Work Order stays as APPR.

This is the status to facilitate the tracking of certain business scenarios that require a distinction between Approved and In Progress status.

INPRG [In Progress]

  It is next level from Approved condition. For example, once the material has arrived, the WMATL status gets relieved, and the work is now being done. 

WSCH [Waiting to be Scheduled]

  In most cases, PM Workorders will have WSCH as their default status.

WSCH denotes a condition where the necessary approvals and material are in place for a work order, but certain conditions ( labor availability, or plant environmental condition) are not letting it to proceed further and hence the work order is being rescheduled to a new start date. 

This status can be after APPR, or WMATL, or INPRG. 

Storeroom Material Status
http://www-01.ibm.com/support/docview.wss?uid=swg21683844

Reference:
http://www-01.ibm.com/support/docview.wss?uid=swg21569661
http://www-01.ibm.com/support/docview.wss?uid=swg21619886