An Analysis of The Factors That Affect The CycleTime of a Quayside Gantry Crane In Container Termina

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An Analysis of The Factors That Affect The
Cycle-Time of a Quayside Gantry Crane In
Container Terminals

• Mark Medd
• BSc (Hons) Nautical Science
• Liverpool John Moores University
• England

IAMU AGA 7 Dalian, China October 2006
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Content Of The Presentation

• Aim and objectives of study

• Methodology used

• Principle Findings

• Conclusions Made

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Aim and Objectives
To analyse the factors that affect quayside
operations in container terminals and to
methodically determine through mathematical
analysis how these factors can be incorporated
into an actual cycle-time calculation.  
(Dissertation Ch.1 p.8)
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Aim and Objectives ..
Objectives
To explain and describe the processes involved in
loading or discharging a container to or from a
containership
1.
2.
Identify the factors that affect quayside
cycle-times
Determine which factors have the greatest impact
on the quayside operation and why
3.
4.
To analyse how much each factor can affect the
quayside cycle-time
To develop an easy to follow formula that can
effectively calculate the actual quayside
cycle-time of a quayside gantry crane, thus
establishing a way to incorporate the most
significant factors
5.
(Dissertation Ch.1 pp.8-9)
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Methodology used
Mixed Model Approach
Quantitative
Qualitative
Time cycle-times and consequently the affect of
the factors (Appendix I, II and III)
Factors that affect cycle-time (Appendix I and
interviews)
This method combines the precision of
quantitative data, with the depth of
understanding of qualitative information.
(Dissertation Ch.2 pp.22-25)
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Principle Findings
The quayside cycle
(Dissertation Ch.3 pp.26-29)
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Principle Findings..
Factors that affect cycle-time
(Dissertation Ch.3 pp.30-33)
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Principle Findings..
To what extent does each factor affect cycle-time
(Dissertation Ch.4 p.44 and 56)
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Principle Findings..
(Dissertation Ch.4 p.44-46)
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Principle Findings..
(Dissertation Ch.4 p.48-50)
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Principle Findings..
4. Load/discharge position of container
(Dissertation Ch.4 p.50-54)
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Principle Findings..
(Dissertation Ch.4 p.54-58)
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Principle Findings..

• Actual Cycle-time calculation

CTTheoretical Theoretical Cycle-Time P
Position Factor/Multiplier H Hatchcover time
allowance DT Down Time per move T
Twistlock constant (14 seconds)
(Dissertation Ch.5 p.65)
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Conclusions Made

• Six main factors that affect the cycle-time

• Some factors have more of an affect than others

• The actual cycle-time of a quayside gantry
  crane can be calculated
• using the following formulas

(Dissertation Ch.5 pp.76-77)
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- End -
Thank you for your time
Mark Medd BSc (Hons) Nautical Science
Liverpool John Moores University England