- •Lecture 2. Transportation Process Technology and the Supply Chain
- •*The term path is used in the book to define both a choice alternative and a path in a graph. The term route is also used in the literature with either or both of these meanings.
- •Classification of Systems
- •2.3. Production and Transportation Systems
- •Information n
- •Information
- •Information
- •2.4. Transportation System Identification and Research
- •Identification of disorder and misconception of objectives relating to individual executors in functioning of a single system.
2.4. Transportation System Identification and Research
Transportation system identification is the definition of the elements and relationships that make up the system to be analyzed. It includes the following steps:
• identification of relevant spatial dimensions;
• identification of relevant temporal dimensions;
• definition of relevant components of travel demand.
Some comments on the different steps are given below. However, it should bestated at the outset that system identification cannot be reduced to the mere application of a set of rigid rules. Rather, it requires the application of professionalexpertise, which is acquired by combining experience with a thorough knowledgeof the methods of transportation systems engineering.
Systems approach is applied in:
design of new processes and systems;
reforming of a given system, comparison and assessment of the advantages of different plans;
consideration of interrelations between a given individual task and external conditions; identification of factors and variables that influence the situation under the given conditions;
design of a scheme for evaluation of various subsystems and the system on the whole;
Identification of disorder and misconception of objectives relating to individual executors in functioning of a single system.
The general notions of systems analysis applied to transport objects allow formulation of a fixed order of research and decision-making in transportation.
The stages of transportation systems research are suggested below.
Stage 1.Identification of objectives and functioning of the subject of research, defining the criterion of system’s efficiency.
Stage 2.Definingthebordersofthesystem.
Stage 3.Identification of the structure of environment.
Stage 4.Research of the structure of transportation system; identification of its elements.
Stage 5.Investigation of the characteristic interrelations between the elements of the system; design of the mathematic model of the system’s behaviour.
Stage 6. Search of the optimum state for the devised mathematic model of transportation system.
Stage 7. Development of management directions aimed at achieving the optimum state of the system.