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3.3.3 KPI-3 Safety-Critical Maintenance Backlog
The KPI-3 produces a report of the total number of backlog hours for safety-critical maintenance that is beyond its
planned completion date. This excludes backlog maintenance that has been subject to a formal and robust deferral
process involving relevant technical or engineering authorities.
As can be seen in Figure 14 below, the data show a seasonal (cyclic) nature probably reflecting campaignmaintenance
patterns (for example, planned major maintenance shutdowns). From January 2013, periodic increases can be seen in
the backlog figures and these will be explored further by Oil & Gas UK’s KPI work group and Assurance & Verification
Network. Possible contributors to the increased backlog might include the suspension of EC225 helicopter operations
for part of 2013, following the ditchings in 2012, and a protracted period of adverse weather in quarter one 2013. It is
also possible that overall numbers are distorted by a relatively small number of high man-hour maintenance routines
falling into backlog. As quoted in previous annual reports, maintenance specialists within the KPI work group regard
the historical backlog performance as acceptable while still making every effort to drive backlog down.
Figure 14: Average Number of Planned Maintenance Man-Hours in Backlog per Installation
0
50
100
150
200
250
300
350
Jan-‐09
Mar-‐09
May-‐09
Jul-‐09
Sep-‐09
Nov-‐09
Jan-‐10
Mar-‐10
May-‐10
Jul-‐10
Sep-‐10
Nov-‐10
Jan-‐11
Mar-‐11
May-‐11
Jul-‐11
Sep-‐11
Nov-‐11
Jan-‐12
Mar-‐12
May-‐12
Jul-‐12
Sep-‐12
Nov-‐12
Jan-‐13
Mar-‐13
May-‐13
Jul-‐13
Sep-‐13
Nov-‐13
Number of Man-‐Hours in Backlog per Installation
Source: Oil & Gas UK
Source: Oil & Gas UK
