Asset Criticality Tool

7/23/2019 Asset Criticality Tool

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Guidelines for use of the Asset Criticality Tool

Enter Asset name and number from eAM.

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• The next column is simply the mathematical sum of the 7 criteria point values.

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Comments

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Score each of the 7 criteria from “Operational Severity” to “Spares ead Time”. !sethe definitions and “"ei#htin#” contained in the “$riteria %efinition” tab.

“Asset $riticality& is the ratio of actual points'total points possible (7)*+, "hich ran-sassets on a // point scale.

“Asset $riticality” is a number from //0 that "ill correspond "ith asset criticality ineAM (future level is //0, current level is 0*+. %eterminin# &Asset $riticality& is thelast step as it &rolls up& all assets evaluated to date. The outcome is a ran-in#, bycriticality, of all plant "ide assets from hi#hest (//+ to lo"est (+.

This standard criticality tool enables plants to prioriti1e assets and resources on thee2uipment most critical to plant operation. The intent of this tool is to initially focuseveryone3s ener#y on the most critical (Top 4/5+ plant assets in order to determinethe optimum maintenance strate#y by first performin# failure mode analyses, so that6M'6dM optimi1ation and Asset ealth can then be applied.

The overall purpose of this tool is to provide a ran-ed list of assets in the plant todetermine the top 4/5 based on a standard set of criteria. The criteria are selectedto represent the criticality of the e2uipment to the facility. ence the name criticalityanalysis.

8ive of the seven criteria columns correlate "ith specific fields in the 9so#raph Availability :or-bench. This correlation allo"s the ;eliability En#ineer to import theinformation into Avsim "ith little effort. Additional information about the specific

AvSim field is listed in the comments for the column title.

The &#ranularity& or spread of the criticality scores is a function of the number of2uestions as-ed and the ran#e of each 2uestion. The actual sum is not important,from 07)*, but the ran-in# of e2uipment is important. <ote that there may bemultiple e2uipment 9%3s that have the same criticality.



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The Spares ead Time criteria is used to estimate several fields in the AvSim. The#eneral description for the stores system in AvSim is included for reference. The

AvSim module contains a po"erful spare part trac-in# al#orithm that allo"s spareparts to be traced throu#h three echelon levels. Echelon level is nearest to thesystem and may represent spares stored =on site> for a process plant, or =on board> fora ship etc. evel 4 is the next available level and may represent spares stored at a=depot>, or at a local vendor in to"n, for example. evel ? is used to represent thesource of the spare (e.#. factory+ from "hich the other echelon levels and system arere0supplied. The repair shop may be used to re0cycle spares into the echelonhierarchy.

The spares criticality ran-in# can be used to estimate the o#istics delay time in anyof the ? levels. The model above may be useful to thin- about "hen discussin# thisfactor to insure "hich issue you concerned "ith.



ASSET CRITICALITY ANALYSIS SPREAD S

Asset Num"er Le#el $ System! Le#el % Asset!

O p e r a t i o n a l S e v e r i t y



EET ACASS!

Com&any

S a f e t y S e v e r i t y

E n v i r o n m e n t a l S e v e r i t y

S i n # l e 6 o i n t 8 a i l u r e

M a i n t a i n a b i l i t y

; e l i a b i l i t y

S p a r e s e a d T i m e

S u m o

f C r i t e r i a

A s s e t C r i t i c a l i t y



'&erational Se#erity

@ased upon desi#n capacity not mar-et or schedule re2uirements.

Safety Se#erityPersonal In(ury Potential

// <one

4* Minor inBury'over exposure to reversible health ha1ards, such as nuisance dust or irritants.

?) Moderate inBury'over exposure to an irreversible health ha1ards such asC noise, sensiti1ers, fluoride, silica or corro

*D Serious inBury or death'over exposure to a -no"n carcino#en such as chrome ), $T6 or asbestos

)ire*E+&losion Potential

// <one

4* o" 0 E2uipment "on>t burn but spar-s'flame may cause locali1ed fire on or close to e2uipment, molten metal po

?) Moderate 0 8ire'explosion can dama#e e2uipment and'or spread to adBoinin# e2uipment or structures, oil fires, me

*D i#h 0 8ire can cause si#nificant dama#e to e2uipment, complex or buildin# seriously impactin# business operatio

Safety Durin, -aintenance

// <one 0 <o'o" safety issues "hile performin# maintenance.

4 $ompliance issue. :e are subBect to fines, curtailment, or criminal prosecution for failure to comply "ith local, stat

4* o" 0 oistin# or ri##in# e2uipment re2uired

?) Moderate 0 8all protection, hi#h pressure line brea-

*D i#h 0 $onfined space, electrocution, en#ulfment

En#ironmental Se#erity

/ <one

o" 0 <uisance dust or mist collects on nearby e2uipment'floor, house-eepin# issue.

?/ Moderate 0 %ust, fumes, smo-e inside the buildin# that can affect persons or e2uipment (asphyxiant, irritant, corro

* Severe 0 %ust, fumes, smo-e, emissions released outside buildin# (asphyxiant, irritant, corrosive, poisonous, etc+

o" 0 catch pan, concrete floor, slo" movin# fluid (#rease+.

?/ Moderate 0 li2uids or po"ders onto or into the soil or "ater "ithin the plant.

)/ $ompliance 9ssue 0 :e are subBect to fines, curtailment, or criminal prosecution for failure to comply "ith local, sta

Sin,le Point )ailure

o" "ill failure effect the facility3s ability to meet mission re2uirementsF@ased upon throu#hput reduction.

// <o 9mpact

4/ 0 45*/ 4) 0 /5)/ 0 75

D/ 7) 0 GG5// //5

<umber imports into AvSim Effects under the same name in the per occurrence table.

4 $ompliance 9ssue 0 :e are subBect to fines, curtailment, or criminal prosecution for failure to comply "ith local, stat

4 $ompliance 9ssue 0 :e are subBect to fines, curtailment, or criminal prosecution for failure to comply "ith local, stat

Air Emissions 0 Dust. )umes. Gases. Smo/e. Etc0

)/ $ompliance 9ssue 0 :e are subBect to fines, curtailment, or criminal prosecution for failure to comply "ith local, stat

Chemical S&ills 0 Lu"es. Cleaner*De,reasers. Chemicals/ <one 0 no chemicals

* Severe 0 li2uids or po"ders onto the soil or into the "ater outside the plant.



-aintaina"ility

Relia"ility

// <o brea-do"ns'corrective

4/ per year

*/ 4 per year

)/ ? per year

D/ * per year

// H per year

S&ares and Lead TimeTime re2uired to repair parts or obtain replacement parts in an emer#ency.

// I "ee-

4/ to ? "ee-s */ ? to ) "ee-s

)/ ) "ee-s to ? months

D/ ? months to ) months

// H ) months

9s there a "ay to minimi1e loss caused by failureF

// <o oss 4/ ;edundant Auto */ ;edundant Manual

)/ :or- around possible D/ ;educed capacity// $omplete oss

This field helps identify the type of standby in AvSim under the @loc- properties and the rulestab. The options are ot, $old and :arm.

Maintainability is a characteristic of desi#n and installation, expressed as the probability that anitem "ill be retained in or restored to a specified condition "ithin a #iven period of time, "henthe maintenance is performed in accordance "ith prescribed procedures and resources.

6roduct ofJ Serviceable (must be easily repaired+ and Supportable (must be cost0effectively-ept in or restored to a usable condition+

// Serviceability is hi#h and Supportability is hi#h 4 Serviceability is hi#h or Supportability is hi#h / Serviceability is lo" or Supportability is lo" //Serviceability is lo" and Supportability is lo"

!se the last t"o previous years data to determine the number of brea-do"ns or routine tas-sperformed on each asset.



ives.

s>, etc.

tal fires, dust clouds.

s.

e, or federal re#ulations or a#reements.

sive, poisonous, etc+

e, or federal re#ulations or a#reements



e, or federal re#ulations or a#reements



Documents

Asset Criticality Tool