DYNAMIC SUPPLY CHAIN SCHEDULING

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29 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

215 εμφανίσεις

DYNAMIC SUPPLY CHAIN

SCHEDULING


Dmitry Ivanov


University of Hamburg

E
-
Mail: dmitry.ivanov@uni
-
hamburg.de



Abstract

Based on a combination of fundamental results of modern optimal program control theory and
operations research, an original approach to
supply chain scheduling is developed in order to
answer the challenges of

dynamics, uncertainty, and adaptivity. Both
supply chain schedule
generation and execution control are represented as an optimal program control problem in
combination with mathemati
cal programming and interpreted as a dynamic process of oper
a-
tions control within an adaptive framework. In addition, operations control and flow control
models are integrated and applicable for both discrete and continuous processes. The essential
structu
ral property of this model is the linear right parts of differential equations. This allows
applying methods of discrete optimization for optimal control calculation based on applying
Pontryagin’s

maximum principle and the resulting essential
reduction of
problem dimensio
n-
ality
that is under solution at each instant of time. The gained insights contribute to supply
chain scheduling theory providing advanced insights into dynamics of the whole supply
chains (and not any dyadic relations in them) and transiti
on from a partial “one
-
way” schedule
optimization to the feedback loop
-
based dynamic and adaptive supply chain planning and
scheduling.



1.

INTRODUCTION


Supply chains (SC) are subject to the dynamics and uncertainty of an actual ex
e-
cution environment. An SC schedule may be subject to numerous unplanned
changes/disruptions and, therefore, need continuous adaptation.
Recent studies
indicated that
the scheduling

needs to be considered with regard to dynami
c a
s-
pects, a real performance and perturbed execution environment to fill the gap
between theory and practice of scheduling
[1]
. Modern developments in info
r-
mation technologies such as RFID (Radio Frequency Identification), SCEM
(Supply Chain Event Managem
ent) and mobile business provide a constructive
basis to facilitate feedbacks between SC scheduling and execution control. In
this setting, the extensive development of approaches and models to SC
pla
n-
ning and scheduling

under the attracting adaptation met
hods is becoming timely
and crucial

[2
-
5]
.

In this study, the issues of SC scheduling with regard to dynamics, uncertainty,
and adaptability are pushed to the forefront of consideration in order to invest
i-
gate the interrelations of SC schedule generation
and execution control in a d
y-
namic environment based on their interpretation as a dynamic process of oper
a-
tions control. The purpose of this paper is to describe the important issues and
perspectives that delineate dynamics in SC scheduling, comment on met
hodical
issues, and describe one specific context, model and algorithm in the dynamic
SC scheduling area.


2.

TABLES AND FIGURES


Figures and table captures 12 pt.



3.

REFERENCES


1.

Ivanov, D.,
Sokolov, B. Adaptive Supply Chain Management. London: Springer, 2009.

2.

Ivanov, D.A., Sokolov, B.V.,

and Kaeschel, J.

A multi
-
structural framework for adaptive supply
chain planning and operations control with structure dynamics considerations
, in:
European

Jou
r-
nal of

Operational Research
,
Vol. 200, 2010, pp. 409
-
420.

3.

Ivanov,

D.,

Sokolov B. (2010) Dynamic supply chain scheduling, forthcoming in
Journal of
Scheduling
, DOI: 10.1007/s10951
-
010
-
0189
-
6

4.

Ivanov D. (2010) A framework for aligning (re)planning decisions on supply chains strategy, d
e-
sign, tactics, and operations, in:
In
ternational Journal of Production Research
, Vol. 48, No. 13, pp.
3999
-
4017.

5.

Ivanov D. (2009) DIMA


A Research Methodology for Comprehensive Multi
-
Disciplinary Mo
d-
elling of Production and Logistics Networks, in:
International Journal of Production Research
, 47;
5; 1153
-
1173.