A Research paper on Effect of Storage Time and Type of

Conditioning on Filling Value of Cut Rolled Stem of Tobacco

Bikram Dahal

Thapathali Campus

Bachelor in Industrial Engineering

INTRODUCTION

• Stem is midrib of leaf

• Filling value

• Two type of Conditioning

• Conditioning to increase moisture for smooth cutting

• Cold conditioned for next day

• Storage for continuous production next day

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3Objective

• Find the effect of storage and conditioning on Filling Value

Methodology

• Data collected from daily report of QUAS

• 10 operation tracked

• Shapiro-wilk test for normality with Q-Q plot

• Levene test for equality of Variables

• t-test: sample mean comparison

• SPSS is used for test

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Literature Review

• High temperature and pressure make cell elastic

• Cells structure of stem help in expansion

• Lower temperature is better for cutting

• Different stem have different absorption property

• Lower moisture penetration can cause crack, rupture

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Limitation

• Filling value depends on moisture

• Process variation

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Result 7

Grade Stem

Shapiro-

Wilk Type Of

Conditioning

Shapiro-

Wilk

p_value p_value

Filling

value

Grade 1 "A" 0.353 Grade 1 "CC" 0.15

Grade 1 "S" 0.353 Grade 1 "HC" 0.934

Grade 2 "A" 0.619 Grade 3 "CC" 0.432

Grade 2 "S" 0.426 Grade 3 "HC" 0.98

Grade 3 "A" 0.438 Grade 2 "CC" 0.392

Grade 3 "S" 0.717 Grade 2 "HC" 0.889

• S = Sample processed on same day A = Sample kept for advance

• CC =Cold Conditioning HC = Hot Conditioning

Shapiro-Wilk test Q-Q plot

Result 8

Levene's Test for

Equality of Variances

t-test

F p_value p_value

Filling

value

Grade 1 "A"/ "S" Equal variances assumed 0.02 0.89 0.004

Grade 2 "A" /"S" Equal variances not assumed 4.75 0.03 0.019

Grade 3 "A" /"S" Equal variances assumed 0.58 0.45 0.196

Grade 3 "A" /"S" “My

samples”

Equal variances assumed 0.07 0.8 0.022

Grade 1 "CC"/"HC" Equal variances assumed 0 0.96 0.008

Grade 3 "CC"/"HC" Equal variances assumed 0.17 0.68 0.417

Grade 2 "CC"/"HC" Equal variances assumed 1.78 0.19 0.092

Grade 2 "CC"/"HC" "A" Equal variances assumed 0.02 0.9 0.555

Levene’s Test and t-test Statistics

Analysis and Discussion

• Grade 1 have longer length

• Steam can increase Cracks, rupture

• Temperature of cutting

• Time is required to form rigid Cell structure

• Temperature of sample while measuring FV

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Conclusion

• Filling Value is not effected by type of conditioning except for Grade 1

• Cold Conditioning is preferred

• Storage time increases rigidity of cell and hence FV

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