Title: Modelling information flow in military and humanitarian supply chains
Abstract:
The purpose of this presentation is to compare two approaches to
modelling information flow in military and humanitarian supply
chains: mathematical network theory and the SCOR model. Theorists
prefer perfect information flow because that makes optimisation
feasible. However, real life is not like that. We look at the
Dutch armed forces' Task Force Uruzghan (TFU) logistics network,
and identify a number of ways in which current theory must be
extended. Finally, we outline a third possible approach using
multi-agent systems, a rationally reconstructed
Observe-Orient-Decide-Act (OODA-RR) decision cycle, and
network-centric communications.
Title: A route planner for gas transport through the Netherlands
Abstract:
Due to liberalization of the gas market and unbundling
of the gas industry in the Netherlands, the problem of reliable
and efficient gas transport has transformed from a long-term,
central planning exercise into a dynamic marketplace driven by
supply and demand nominations with ever shorter lead times.
In this presentation we show a route planner for gas transport
in the liberalized world that we have developed in close
collaboration with the dispatchers in the central command post
of Gastransport Services B.V., the operator of the gas
transmission system of the Netherlands. The route planner
has been running autonomously in the background of the gas
dispatching process for more than a year, providing operators
with cost-optimal transport plans in a similar way as a
satellite navigation system helps a driver to find optimal
itineraries.
We demonstrate how we have been able to map a highly complex
and nonlinear optimization problem with an infinite number of
variables into a linear program to find transport plans with
the lowest fuel cost online. We use a big bag of tricks to do
the job, including an econometric model for physical flow of
gas, iteration of the solution and the model, the concept of
gain scheduling applied to optimization, and, last but not
least, some experience developed while playing Call of Duty.
Finally we will share some of the excitement and some of the challenges of working on a big industrial optimization problem involving critical national infrastructure.
Title: Humanitarian Logistics: a Challenge for Operations Research
Abstract:
Upon the occurrence of a natural or man-made disaster,
the logistical challenges faced by the different aid
organizations are truly daunting. The specific circumstances
caused by such a disaster (e.g., the destruction of the infrasture)
generally make the distribution of goods difficult. The main problem,
however, is usually the difficulties encountered in the logistical
organization of the distribution of aid. These difficulties can
(at least partially) be avoided by a more adequate preparation
and a more adequate planning and execution of the relief operations.
Humanitarian logistics is increasingly important due to an upward
trend in the number of disasters and in their impact, and due to
the fact that about 80% of the costs of humanitarian aid are
logistical. Tomasini and Van Wassenhove (2009) define four phases
in the cycle of disaster management: mitigation, preparedness,
response, and rehabilitation. In the mitigation phase, measures
are applied to prevent a disaster from occurring or to minimize
its impact. Measures taken in the preparedness phase allow the
community to respond effectively to a disaster when it occurs.
The response phase groups all activities aimed at alleviating
the consequences after the disaster, i.e., preserve life, the
environment, and the social, economic, and political structure
of the community. Activities in the recovery phase are aimed at
restoring the damaged aspects of the affected region. In each
of these phases, logistical planning problems arise, that can
be dealt with by adequate OR/MS methods. These problems can be
divided into problems involving strategic/tactical (long- or
medium-term) decisions, operational (short-term) decisions,
or a combination of both (integrated problems).
Humanitarian logistics differs considerably from logistics in a
business context, and models and methods developed in business
logistics are generally not transferable to a humanitarian environment.
This talk identifies some key challenges for the field of OR/MS in
humanitarian logistics.
Title: Sales & Operations Planning: Concepts and Practical Implications
Abstract:
In his presentation Noud Gademann will talk about Sales & Operations
Planning, a planning concept that is well known for a long time, but
that has received much attention from industry lately. He will
introduce the main concepts of S&OP and will explain how it fits
into supply chain optimization. Based on some examples from practice
he will elaborate on practical implications, pitfalls and lessons
learned. One of them is that it is important to align supply chain
planning processes like S&OP with the business strategy to make it
successful. And that is not as easy as it may seem.
Title: Sales and Operations Planning: Trends and the OR impact
Abstract:
Forecasting and planning are at the area of all businesses. Sales
and Operations Planning (S&OP) is the process in which key managers
from sales and operations meet frequently to develop realistic plans
and promise dates for new orders. S&OP is the set of vital
communication and decision-making processes for developing a company
game plan that balances market demand with resource capability.
A working S&OP process provides a way to draw out functionally
conflicting objectives and resolve them so as to develop a true
manufacturing/marketing contract, integrate all functions of the
business by developing a "single set of numbers" from which all
other plans and schedules can be developed, and provide a forum for
evaluating company performance.
The presentation provides an overview of the S&OP domain and
discusses market and technology trends and the impact on required
OR solutions. Including:
- Forecast differentiation
- How to handle BIG DATA from social media in forecasting and planning
- Control tower concepts
- Promotion planning
- New product forecasting
- Human behaviour in forecasting and planning
Title: Building a strategic network of medical centers Why the African truck-driver is so glad that Operations Research exists
Abstract:
The NGO 'North Star Alliance' places medical centers,
also called 'Roadside Wellness Centers' (RWCs),
at busy truck-stops along the largest highways in Africa.
In order to serve the African truck drivers as good as possible,
up to 130 new RWCs will be established in the next few years.
These investments serve two objectives. First, by placing these
RWCs at busy truck-stops, North Star intends to increase the
number of truck drivers which have access to medical service.
Next to that, the investments should create a network of RWCs,
in which a truck driver who suddenly needs medical help does
not need to drive a long time along his route before passing
an RWC. In order to realize these goals, it is very important
to choose the locations of new RWCs deliberately. Therefore,
an MIP model is developed which North Star can use to identify
the optimal locations for all future RWCs. By placing RWCs at
these locations, the number of truck drivers which have access
to medical help is maximized, and the expected time to the next
RWC passed by a truck driver (from the moment he suddenly needs
medical help) is minimized.
Title: Strategic supply chain solutions in 'green' development environments
Abstract: In my time spent in Malawi I've reviewed the BERL supply
chain and constructed a simulation model for the next ten years.
Based on several logistic and agricultural inputs management decisions
are translated into supply chain outputs (cost, storage, trips, etc).
With this logistic model an appropriate frame has been set for BERL's
supply chain and its challenges for the years to come. Based on the
model, BERL has started making these concepts real by redesigning
their supply chain from the collection centers of Jatropha seeds to
the central factory and back. BERL staff has been trained for this
purpose. My presentation will show how an OR-model in a development
context works and what it changed for the future of a bio-energy
company as BERL.
Title: Scenario analysis for emergency inventory prepositioning of medical supplies
Abstract:
Emergency inventory prepositioning deals with
the strategic positioning of inventory close to or in a potential
disaster area in preparation for disasters to improve the response
and efficiency of the relief aid. There is little research considering
how to manage such inventory. Particularly given the following
circumstances emergency inventory prepositioning requires special
attention:
items in emergency prepositioning inventory are often similar
to those used in development programmes so how to manage items
with such dual uses? Though air is the predominant way of
distributing in the wake of a disaster there are opportunities to
use other modalities as well - so there is a trade-off in transport
modalities that needs to be accounted for in inventory policy.
Organizations first need to obtain funding before being able to
respond so there are funding constraints, and often funding is
earmarked, meaning that it may be used for very specific purposes
only (e.g., for stocking only specific items). Last, shelf life of
relief items may be limited (which is particularly the case for
medical items), requiring some form of rotation of emergency
prepositioning stock to prevent obsolescence. We will discuss the
results of a scenario analysis of inventory policies for the
management of medical supplies in emergency prepositioning,
taking into account some of the aforementioned aspects, and
using the results of a case in Zimbabwe.