TUGAS SOFT SKILL 2

Tugas 2 sofskil (teknik perawatan)

Tugas 2 - PerawatanMesin

Tanggal : 11 juni 2017

Materi : ( Maintenance Costing ) / BiayaPemeliharaan

Khalifah Agung Sedayu – 25414849 – 3IC09

Kerjakanlahsoal – soal maintenance costing berikutini !!

1.      To Calculate the mean time to repair (MTTR ) ?

a.       Eight Subsytem : a, b, c, d, e, f, g, h form an electronic system.

b.      The constants failure rates of these subsystems are :

la = 0.002 ,lb = 0.004 , lc = 0.006 , ld = 0.008 , le = 0.010 , lf = 0.012 , lg = 0.014 , lh = 0.016 failures per hour.

c.       The corresponding estimate corrective maintenance time are :

Ta = 2 hour, Tb =  3 hour, Tc = 4 hour, Td = 5 hour, Te = 6 hour, Tf = 7 hour, Tg = 8 hour, Th = 9 hour.

2.      Data historical of machine in industry :

a.       Hour ( 0 to 200) = up-time

b.      Hour ( 200 to 210 ) = down-time

c.       Hour ( 210 to 400 ) = up-time

d.      Hour ( 400 to 415) = down-time

e.       Hour ( 415 to 590 ) = up-time

f.       Hour ( 590 to 600 ) = down-time

g.      Hour (600 to 750 ) = up-time

To calculate of :

·         the mean time to between failure (MTBF ) and mean downtime (MDT) ?

·         the annual labor cost of corrective maintenance (CM_al) ?

Whereas : SOH = 3500 hour, MTTR = 30 h, LCH = $ 40.

3.      Maintenance Cost-Related Data :

Description	Manufacture A system	Manufacture B system	Manufacture C System
Expected Life	15 years	15 years	15 years
Expected cost of  a corrective maintenance action	$2000	$2500	$3500
Annual failure rate	3 failures per year	3.5 failures per year	2.5 failures per year
Annual interest rate	4 %	4 %	4 %

Determine which of the three system will be less costly with present value of corrective maintenance ( Find the value of (PV)?

NB : Using the Formula II.

4.      Assume that we have the following time estimates to accomplish an activity :

OT = 85 days

PT = 105 days

MT = 90 days

To Calculate the activity expected duration time  ( T_a )?

           

5.      Assume that in maintenance organization we have the following data :

TAH = 2500 hour

BR = 0.2

LR = $25

N  = 50

To Calculate the cost per employee (C_em)and The total labor cost ( TLC )?

#Jawaban :

1.  4x10^-3 + 0,012 + 0,024 + 0,04 + 0,06 +0,084 + 0,112 + 0,144

                                     0,072

=  0,48 

   0,072

= 6,67

2.  a.MTBF

200 + 190 + 175 + 150

    4

= 178,75

 MDT

 10 + 15 + 10

        3

         = 11,66

b.= 3500 x 40 x 6,67

                         178,75

   = 933800

       178,75                    
  =5224,06

3. MANUFACTURER A SYSTEM

      MANUFACTURER B SYSTEM

        MANUFACTURER C SYSTEM

4. Calculate the activity expected duration time

             

5.Calculate the cost per employee (C_em)and The total labor cost ( TLC )