Measuring Productivitygsgs

7/27/2019 Measuring Productivitygsgs

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Measuring Production:

Speaking a Common

Language


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Common Language

The logger from across the hollerin the same type of wood

produces 30 loads a week, youproduce 25. Whats the deal?

Is it a good comparison?

Productivity = Output/Input Both output and input should have

value


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Critical Estimates

Production rate

Utilization rate

10% difference in rates = 10%difference in cost

Incorrect estimates for other

items are diluted in total costOften analyses result in costs afew percent apart


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Measuring Productivity

Inputs

Outputs

Productivity measures

Collecting data


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Inputs

Items that have value

Labor time

Time for which employees and

owners/supervisors are paid

Scheduled machine hours


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Inputs


Machine time

Time that clicks off the hour

meter

Machine hours, Productive

machine hours


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Inputs


Expense

Listed in categories or total costDirect or indirect


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Labor Inputs

Realistic estimate of time on

the clock

Time sheets

Time in (TI), Time out (TO)

Non productive time (NT)Scheduled machine hours:

Total time (TOTI) minus NT


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Non Productive Time

Usually we set a minimum

time limit for reporting

Nothing less than 15 minutes

is recorded

ItemsDriving (Maybe)

Breaks


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Operator: Mathew Machine: Skidder

Date: 9/16/04 Harvest: Jones Tract

Time in Breaks Time out Total time

6:30 40 4:30 9:20Delays (Circle one) Time

Plan Maint Rep Wthr BN Other 30

Plan Maint Rep Wthr BN Other 60

Total 90


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Measures

Scheduled Machine Hours

Mechanical Availability

Operational Efficiency

Utilization Rate


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Scheduled Machine Hours

0

2

4

6

8

10

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Day

Scheduledmachinehours

Feller Loader Skidder


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Total SMH

93.7

96.7

92.7

90

92

94

96

98

100


Total


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Percent of time machine is

mechanically available for work

1 (Maintenance and repair hrs/

SMH)


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0%

20%

40%

60%

80%

100%

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Days

Mech.

Avail.(

%)



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0.76

0.91 0.93

0%

20%

40%

60%

80%

100%


Mech.Avail.(%

)


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Percent of time people and

machines can work. Losses from

operational problems

(ex.planning, moving, bottlenecks,

weather).

1 (Lost hours/SMH)


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0%

20%

40%

60%

80%

100%

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Days

Oper.Eff.(%

)



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0.9

0.84

0.92

60%

80%

100%


Oper.Eff.(%

)


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Machine Input

Machine hours (MH) = end

minus start hours

Non productive time (NT)

Productive Machine Hours

(PMH) = MH - NMT


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Non Productive Time

Machine time spent not

producing wood (or in supporting

task) Usually we set a minimum time

limit for reporting those

Minimum of 15 minutes or 0.25 hr

Main example is idling time


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OperatorMathew Machine Skidder

Date 9/16/04 Job Jones Tract

Meter in 5462.3

Meter out 5469.5 Machine hours(out in) 7.2

Non productive machine time Time

Plan Rep Maint Idle Other( ) 0.5

Plan Rep Maint Idle Other( ) 0.25Total non productive time (NMT) 0.75


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Machine Hours

0

2

4

6

8

10

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Days

MachineHours



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Total Machine Hours

57.2

77.6 77

50

55

60

65

70

75

80


MachineHo

urs


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Productive Machine Hours

(%)0.99

0.850.98

0%

20%

40%

60%

80%

100%


MachineHo

urs


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Utilization Rate

Percent of scheduled machine hours that

machines are productive

(Productive machine hours/

Scheduled machine hours)


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Utilization Rate (%)

0.6

0.68

0.82

0%

20%

40%

60%

80%

100%


Ut

ilizationRate(%)


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Long Term Skidder Data

Cat

518

TJ

450C

TJ

460

TJ

660

Avg UR 65.6 64.8 76.5 70.7

Max UR 94.8 91.4 96.4 90.0

Avg. PMH 6.7 6.5 8.1 7.8

Max PMH 9.3 9.0 10.3 9.9


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Outputs

Wood delivered

Wood merchandized

Silvicultural results

Potential stand value

Cost of ameliorative treatments


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Production

020406080

100120140160

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Day

D

ailyproduc

tion(tons)


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Commodities

0

20

40

60

80

100

120

140

160

1 2 3 4 5 6 7 8 9 10 11 12 13 14

CNS Logs Pulpwood


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Wood Volume

For long periods (harvest, month, or

year) scale tickets equal production

Error is small in relationship to totalvolume


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Wood Volume

For short periods (week or day)

Production may not equal scale

ticketsWood on deck or on trailers from

previous period

Wood left on deck or trailers at the

end of the period


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Wood Merchandized

Identify loads by

Delivered value of products

Markets that differentiate

product specifications.

Increased value = Increasedproductivity


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Machine Production

18.5

15.9

13.8

10

12

14

16

18

20


Tons/PMH


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Labor Production

11.210.8

11.3

10

12

14

16

18

20


Ton

s/Schedule

dhour


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Daily Loader Production

0

30

60

90

120

150

0 2 4 6 8 10

PMH

Da

ilyProduction(tons)


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Daily Loader Production

0

30

60

90

120

150

0 2 4 6 8 10

SMH

Da

ilyProduction(tons)


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Supporting Data

Product types, species and

sorts

Average piece size

Over all or by product, species

External delaysTrucks, Moves, Weather


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Silvicultural Results

Departure (Positive or

Negative) from goal

Desired diameter

distribution/tree quality

Residual damageRutting/disturbance (area and

severity)


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Silvicultural Results

Amelioration

Ratio of trail length retired to

harvested acres

Ratio of landing acres to

harvested acres

Ratio of stream crossing to

harvested acres


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Conclusions

Just a little data goes along way Need most of it anyway

Monthly or tract totals by handare simple

Spreadsheets can make thiseasier No complex programming Use Pivottable function (Excel)

Measuring Productivitygsgs

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