1. Maintenance is important for keeping ships' machinery and equipment functioning properly. The International Safety Management Code specifies rules for maintenance management. 2. There are different types of maintenance procedures including planned, predictive, and unplanned maintenance. Planned maintenance involves scheduled, documented activities to reduce downtime. Predictive maintenance uses data analysis to detect potential issues before failures occur. 3. Condition-based maintenance monitors machinery regularly using sensors to assess condition and perform maintenance as needed. Reliability-centered maintenance determines strategies based on reliability analysis including failure modes. Unplanned maintenance occurs when equipment fails unexpectedly without a maintenance strategy in place.

1. SHIP
MAINTENANCE
Padmini Ramasamy

2. Maintenance is one thing that keeps any
mechanicalequipment or machinery
going. Weatherit is a small machine or a
largestructure, efficientmaintenancecan
help with prolonged life and favorable
outcome. On a ship, maintenanceis one
thing thatkeeps machinery up to date
and is smooth running condition.
Why Maintenance?

3. International Safety Management Code
(ISM) specifies the rules and regulations
for maintenance management. ISM
describes in general how ships should be
maintained, inspected, non-conformities
be reported, and corrective actions are
taken.

4. The main objectiveof a maintenance
plan is to make sure that the work is done
in the least possible time with utmost
efficiencyand at optimum cost.
Objective

5. TYPES OF
MAINTENANCE
PROCEDURES

6. Plannedmaintenancerefersto anymaintenance
activitythatisplanned,documented,and
scheduled.Theaimof plannedmaintenanceis to
reducedowntimeby havingallnecessary
resourcesonhand,suchaslaborandparts,anda
strategyto usetheseresources.
1. Planned
Maintenance

7. Itis famouslyknownasthePMS orplanned
maintenancesystem.Inthistypeofsystem,the
maintenanceis carriedoutaspertherunning
hourslike4000hrs.,8000hrs.etc.,Orby the
calendarintervalslike6 monthly,yearlyetc.Of the
machinery.Themaintenanceis carriedout
irrespectiveof theconditionof themachinery.
Thepartshavetobe replacedif itis writteninthe
schedule,evenif theycanbestillused.
1.1 Preventive
or Scheduled
Maintenance
System

8. Predictivemaintenanceis atechniquethatuses
dataanalysistoolsandtechniquestodetect
anomaliesin youroperationandpossibledefects
inequipmentandprocessessoyoucanfix them
beforetheyresultin failure.
1.2 Predictive
Maintenance

9. Inthissystemthemachinerypartsarechecked
regularly.Withthehelpof sensorsetc.the
conditionof themachineryis accessedregularly
andthemaintenanceisdoneaccordingly.This
systemrequiresexperienceandknowledgeas
wronginterpretationmaydamagethemachinery
andleadto costlyrepairswhichmaynotbe
acceptableby thecompany.
1.2.1
Condition
Maintenance
system

10. 1.2.1 Types of
condition-
based
maintenance

11. 1.CBMisperformedwhiletheassetisworking,which
lessensthechancesofdisruptiontonormaloperations
2.Reducesthecostofassetfailures
3.Improvesequipmentreliability
4.Minimizesunscheduleddowntimeduetocatastrophic
failure
5.Minimizestimespentonmaintenance
6.Minimizesovertimecostsbyschedulingtheactivities
7.Minimizesrequirementforemergencyspareparts
8.Optimizesmaintenanceintervals(moreoptimalthan
manufacturerrecommendations)
9.Improvesworkersafety
10.Reducesthechancesofcollateraldamagetothe
system
1.2.1
Condition
Maintenance
system
Advantages

12. 1.Conditionmonitoringtestequipmentisexpensiveto
install,anddatabasescostmoneytoanalyze
2.Costtotrainstaff–youneedaknowledgeable
professionaltoanalyzethedataandperformthework
3.Fatigueoruniformwearfailuresarenoteasily
detectedwithCBMmeasurements
4.Mayrequireassetmodificationstoretrofitthesystem
withsensors
5.Unpredictablemaintenanceperiods
1.2.1
Condition
Maintenance
system
Disadvantages

13. ReliabilityCenteredMaintenance(RCM)isa
procedurefordeterminingmaintenance
strategiesbasedon reliabilitytechniques,
includingFailureModeEffectandCriticality
Analysis.Inthemaritimeworldisstill abig hurdle
forshipowners,dueto thebig impactand
necessaryresources
1.2.2
Reliability
Centered
Maintenance

14. Unplannedmaintenanceis anymaintenancetask
thatoccursunexpectedly.Ithappenswhenthere
is noformalstrategyin placetoaddressa repair,
replacement,orinspectionbeforeit'sneeded.
Unplannedmaintenanceis commonlytheresult
of equipmentfailurethatwasnotanticipated.
2. Unplanned
Maintenance

15. Inthissystemthemaintenanceis carriedout
whenthemachinerybreaksdown.Thisisthe
reasonit isknownasthebreakdown
maintenance.Thisis nota suitableandgood
methodassituationsmayoccurwhereinthe
machineryis requiredin emergency.Theonly
advantageofthissystemis thattheworkingof
machinerypartsis usedto itsfulllifeoruntilit
breaks.Thissystemmightgetcostlyasduring
breakdownseveralotherpartsmayalsoget
damaged.
2.1 Corrective
or Breakdown
Maintenance

16. 1. Safetyissuescanoccurwithunplannedfailures
2. Canbe costlydependingonpartsthatfail
3. Requirescarefulplanningandexecution
4. Canbe difficultto pinpointsourceof issues
2.1 Corrective
or Breakdown
Maintenance
Cons

17. THANK YOU