This paper describes the analysis of data from a three-year gross time study of skyline, balloon, and helicopter yarding systems operating in Western Oregon. Data collection activities were designed and supervised by the Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service. The specific logging systems studied were running...
This paper describes the analysis of data from a three-year gross time study of skyline, balloon, and helicopter yarding systems operating in Western Oregon. Data collection activities were designed and supervised by the Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service. The specific logging systems studied were running...
Unrelated parallel machines are machines that perform the same function but have
different capacity or capability. Thus, the processing time of each job would be different
on machines of different types. The scheduling environment considered is dynamic in
both job release time and machine availability. Additionally, each job considered can...
A comparison of two procedures which allocate inspection effort
within a production sequence is presented here. The concern
for quality and the need to hold down the costs of quality has resulted
in mathematical models which locate inspection so that the
desired quality is attained at a minimum cost.
In...
Small, independent logging contractors can benefit
from cost control and cost planning. This report
details the labor and equipment cost components of a
logging crew. Records, both required and available for
determining costs, are discussed. Recommended costing
procedures are illustrated. Although the study took
place in the Pacific Northwest, the...
This dissertation addresses the "multi-machine carryover sequence
dependent group-scheduling problem with anticipatory setups," which arises in
the printed circuit board (PCB) manufacturing. Typically, in PCB manufacturing
different board types requiring similar components are grouped together to
reduce setup times and increase throughput. The challenge is to determine the
sequence of...
This thesis is intended to provide the management of small to medium sized job shop companies with a written plan to implement a formal computerized manufacturing planning and control system. The research stemmed from a case study performed at a typical job shop where growth of production activities was complicating...
This dissertation addresses a hybrid-flow shop scheduling problem with dual resource constraints in a supply chain. Most of the traditional scheduling problems deal with machine as the only resource. However, other resources such as labor is not only required for processing jobs but are often constrained. Considering the second resource...