ALM includes by default the field ''Actual Fix Time'' which calculates the number of days that the defect took to go from open to closed. If you wanted to track this in minutes you would more than likely need to add a few new fields to ALM then manipulate them through workflow code. The ''Actual Fix Time'' is calculated by BG_CLOSING_DATE - BG_DETECTION_DATE . Since those fields only calculate the date that the bug was opened and closed you will need to create new fields that track the date and time, then create another new field that shows the calculation.

For example if I wanted to do this I could create two new fields, I will call them ''Bug Open Time
(BG_USER_01)'' and ''Time to Fix (BG_USER_03)'' Then I would create code and add it to the ''Bug_New'',
''Bug_FieldChange'', and ''Bug_MoveTo'' subs in workflow:

Sub Bug_New
On Error Resume Next
Bug_Fields.field(''BG_USER_01'').Value=tdconnection.servertime
On Error GoTo 0
End Sub

Sub Bug_FieldChange(FieldName)
On Error Resume Next
If Bug_Fields.Field(''BG_STATUS'').value=''Closed'' then
dim OpenedTime
dim FixedTime
OpenedTime=Bug_Fields.Field(''BG_USER_01'').value
FixedTime=tdconnection.servertime
Bug_Fields.Field(''BG_USER_03'').IsReadOnly=false
Bug_Fields.Field(''BG_USER_03'').value=DateDiff(''n'',OpenedTime,FixedTime)
Bug_Fields.Field(''BG_USER_03'').IsReadOnly=true

end if
On Error GoTo 0
End Sub

Sub Bug_MoveTo
On Error Resume Next
Bug_Fields.Field(''BG_USER_01'').IsReadOnly=true
Bug_Fields.Field(''BG_USER_03'').IsReadOnly=true
On Error GoTo 0
End Sub

Now when a user opens a defect the time it takes to be fixed in minutes will be tracked in the ''Time to Fix (BG_USER_03)'' field.