To Select Spo2 probe

Medical Equipment & Systems

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To select Spo2 probe for use To select Spo2 probe for use in L&T Medical productsin L&T Medical products

LARSEN & TOUBRO 1/23

Green Belt: -Sandip Mohite

Team Members:

-Tejas Bengali

in L&T Medical productsin L&T Medical products

To Select Spo2 probe

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Brief History

LARSEN & TOUBRO 2/23

To Select Spo2 probe

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OBJECTIVE:To select Spo2 Probe

SCOPE:Selection from alternatives(No

design changes)

DMADV

LARSEN & TOUBRO 3/23

DELIVERABLES:

Improve product quality.

To Select Spo2 probe

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Patient Monitor

Mother Board

LARSEN & TOUBRO 4/23

Key PadNavigation

KeysModules

Spo2-Module

Spo2 Sensor

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Reliability

Technical

Performance

Ease of SourcingAesthetics

Comfort of use

VOB/VOC Kano’s Model

DMADV

LARSEN & TOUBRO 5/23

Biocompatibility

Standard

patient safety standard

Cost

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PUGH MATRIX

DMADV

Criteria Weight Datum A B C DCompliance to Biocompatibility

Standard10 0

Cost 8 0

Reliability 5 0

Technical Performance 8 0

LARSEN & TOUBRO 6/23

*Present Probe – was used as Datum.

Technical Performance 8 0

Strategic Sourcing preference 4 0

Conformance to patient safety

standard10 0

Aesthetics 4 0

Comfort Level 5 0

Total Score 0

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Patient Safety

DMADV

LARSEN & TOUBRO 7/23

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Technical Performance

DMADV

LARSEN & TOUBRO 8/23

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Criteria Weight Datum A B C DCompliance to Biocompatibility

Standard10 0 -1 0 0 0

Cost 8 0 1 1 1 1

Reliability 5 0 0 0 0 1

Technical Performance 8 0 0 0 0 -1

DMADV

PUGH MATRIX

LARSEN & TOUBRO 9/23

Technical Performance 8 0 0 0 0 -1

Strategic Sourcing preference 4 0 1 1 -1 1

Conformance to patient safety

standard10 0 -1 0 0 -1

Aesthetics 4 0 -1 1 1 -1

Comfort Level 5 0 ? ? ? ?

Total Score 0 -12 16 8 -5

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LARSEN & TOUBRO 10/23

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DOE

Experiment was designed to remove all the biases viz.

1. Previous knowledge

2. Inclination

DMADV

LARSEN & TOUBRO 11/23

3. Effect of day

10 Persons and 6 probes selected for experiment.

1. Variety in terms of gender, age.

Rating from 1-10

-1- Least Comfortable

-10- Most Comfortable

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Probes of

different makes

labeled

LARSEN & TOUBRO 12/23

Black box

To avoid bias

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LARSEN & TOUBRO 13/23

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LARSEN & TOUBRO 14/23

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ANOVA

DMADV

LARSEN & TOUBRO 15/23

• P- Value Indicates that Person, Probe as well as

interaction (PersonXProbe ) are major contributors.

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Residual

Percent

210-1-2

99.9

99

90

50

10

1

0.1

Fitted Value

Residual

10.07.55.02.50.0

2

1

0

-1

-2

Normal Probability Plot of the Residuals Residuals Versus the Fitted Values

Histogram of the Residuals Residuals Versus the Order of the Data

Residual Plots for RATING

DMADV

LARSEN & TOUBRO 16/23

Residual

Frequency

2.251.500.750.00-0.75-1.50-2.25

40

30

20

10

0

Observation Order

Residual

1201101009080706050403020101

2

1

0

-1

-2

Histogram of the Residuals Residuals Versus the Order of the Data

1 and 3. Residuals follow normal distribution.

2. Residuals are symmetrically distributed.

4. Residuals vary randomly with observation order, hence no effect of order.

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ACTUAL RATING

9

8

7

PERSON PROBE

Main Effects Plot (data means) for ACTUAL RATING

DMADV

LARSEN & TOUBRO 17/23

Mean of A

10987654321

6

5

4

654321

Person is more significant than probe

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Mean

10

9

8

7

6

PERSON

3

4

5

6

7

8

9

10

1

2

Interaction Plot (data means) for ACTUAL RATING

DMADV

LARSEN & TOUBRO 18/23

PROBE

654321

5

4

3

2

Interactions suggest people rate same probe differently. People have their

own perception of comfort level.

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SN Ratio AnalysisSN ratios

17

16

Human Probe

Main Effects Plot (data means) for SN ratios

DMADV

LARSEN & TOUBRO 19/23

Mean of S

1

15

14

13

654321

Signal-to-noise: Larger is better

• Probes 2 and 6 show have high SN Ratio, which suggest

that the variance is minimum in their case.

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Mean Ratings

DMADV

Probe Name Probe No.

Comfort

Level

D 4 6.4

C 1 6.55

LARSEN & TOUBRO 20/23

C 1 6.55

E 3 6.7

A 5 6.7

B 6 7.2

Datum 2 7.5

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LARSEN & TOUBRO 21/23

B & C are same in terms of comfort level,

Since B has higher score in Pugh Matrix

B is selected

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Results

�Cost Avoidance of Rs. 2500 per unit.(Cumulative

till July-2010 is Rs 23L)

�Qualitative and quantitative Feedback from four

sales regions indicate good customer acceptance

DMADV

LARSEN & TOUBRO 22/23

sales regions indicate good customer acceptance

and 20% reduction in initial failures(1-3 months)

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Thank You

LARSEN & TOUBRO 23/23

Thank You