OS Installation jobs in status planned are changed to status pending automatically.
This could occur after the upgrade of DOMAIN Manager to 14.0 SP1 or SP2 or when the value of a parameter is changed in OS job.
The problem is that computers are reinstalled unexpectedly.
Open a case to Technical Support in order to ask the fix :
T5SM116 for ITCM 14.0 SP1 (Domain Manager)
T5SM150 for ITCM 14.0 SP2 (Domain Manager)