Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 205 for “"Production cost"”.
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Production cost modeling : a spreadsheet methodology
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1985.
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Reduction of total production cost through the use of safety stock and process improvements
In an ideal production system, supply exactly meets demand. Instantaneous, correct quantities arrive exactly at the right location when needed. However, real-world production systems often have variability- a change in the quantity demanded, a broken part, a shipping delay for a snow storm. The …
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A chronological probabilistic production cost model to evaluate the reliability contribution of limited energy plants
… Baleriaux/Booth convolution-based probabilistic production cost (PPC) model. However, while these traditional PPC algorithms can reasonably represent thermal plant availabilities, they do not accurately represent limited energy plants because of their generic treatment of time. In particular, in …
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Parametric cost estimation utilizing development-to-production cost relationship applied to the advanced amphibious assault vehicle
… the relationship between development unit cost and production unit cost. Historical data from seven armored tracked vehicle programs is used to test the relationship. A study of this relationship is useful when production has not begun and the estimator wants a means to estimate production …
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The significance of production cost inputs in regional technology choice : composite automotive body-in-whites in the US versus China
… managers and engineers. This work models the cost of automotive body in-white production in the United States versus the People's Republic of China. Three body-in-white materials are evaluated for each country: carbon-reinforced composites, glass-reinforced composites, and steel. Based on the …
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Potential for biofuel production from algae based wastewater treatment in California: Can algal biofuels be cost-competitive with traditional petroleum based diesel?
… wastewater treatment with algal biofuel production, additional benefits can be derived, among which could be a cost-savings. In California the average estimated base production cost per gallon for algal biodiesel is $5.98/gallon. Compared to the adjusted production cost of petroleum-based …
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Microalgae-derived HEFA jet fuel : environmental and economic impacts of scaled/integrated growth facilities and global production potential
… investigates strategies designed to reduce the production cost and lifecycle greenhouse gas (GHG) emissions of microalgae-derived HEFA jet fuel. Additionally, the global production potential of HEFA-J is quantified in order to assess the efficacy of microalgae as an energy crop. Impacts from the …
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Seasonality of prices, marketings and cash production costs of broilers in the 10-county Shenandoah Valley area, 1951-1956
… seasonality on marketings, farm price and cash production cost of broilers in the 10-County Shenandoah Valley Area, The association between the seasonal pattern of broiler marketings and the seasonal variation in broiler prices and the relationship of seasonal variations in cash production cost …
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Uncapacitated Lot-Sizing Problems With Setup Interactions
… problems focus on determining a minimal total production cost schedule. These production costs are generally composed of three components: a variable production cost, an inventory holding cost, and a setup cost. The optimal solution balances the holding costs against the setup and variable …
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MODELING AND OPTIMIZATION OF BIODIESEL REACTOR AND FEEDSTOCK
… Although it has shown promise, the higher production cost of biodiesel compared to that of petroleum-based diesel poses a major hurdle in its development with the cost of feedstock (oil) contributing approximately 60% to 80% of the total production cost. Furthermore, the quality of …
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Economic and environmental evaluation of end-of-life aerospace aluminum options using optimization methods
… conspicuous energy savings of secondary aluminum production have caused aluminum recycling to increase. Obsolete aircraft are a valuable source of aluminum scrap and recent efforts to fortify the aerospace aluminum recycling infrastructure have drawn attention to the potential of sophisticated …
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The Development of Real-Time Fouling Monitoring and Control Systems for Reverse Osmosis Membrane Cleaning using Deep Reinforcement Learning
… was to develop a framework that minimizes the cost of membrane fouling by deploying AI-generated cleaning patterns and real-time fouling monitoring. Membrane manufacturers and researchers typically recommend cleaning (standard operating procedure – SOP) when normalized permeate flow, a …
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Assessment of Cross Laminated Timber Markets for Hardwood Lumber
… was to conduct a log yield study of SGHL production from yellow poplar (YP) logs to produce 6'' and 8'' width SGHL to match the PRG 320 requirements. The fourth objective was to determine CLTs' production cost using SGHL and compared it with the CLTs manufactured from southern yellow pine …
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"LOAD MODIFICATION" -- A NEW METHOD TO CALCULATE GENERATING CAPACITY RELIABILITY INDICES
… generating capacity reliability and energy production cost of a power system. This method is essentially a process of modifying a given load duration curve with a generating capacity distribution to give an equivalent load duration curve. This technique is called the 'Load Modification …
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Biofuels supply chain characterization
… ethanol. In this study we analyze the buildup of cost as biomass is transformed into fuel. We also look at all the steps involved and describe them from a supply chain perspective We have found that the main cost components in the cellulosic ethanol production are biomass production, harvesting …
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Activated Carbon Injection for Mercury Control in Coal-Fired Boilers
… impregnated activated carbon. To estimate the production cost of the new sorbent, an economic analysis was performed for the production of 500 tons/yea</p> <p>A high production cost of S7.83/lb. caused the project to be economically unattractive. The raw matenals made up 62% of the total …
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Implementation of lean method and value analysis in the sandblasting production shop at Intersign Corporation
… study, is sandblasting products. Sandblasting production is a job shop operation which is placed in a 55 x 100 ft building (building B). In the near future, the company will expand this production by moving several workstations into the new building, "building C." The objective of this study …
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Variation propagation modelling and cost-oriented process optimisation for aircraft assembly
… aircraft sub-assemblies, present a challenge to production planners, as variations in parts can make it difficult to achieve all assembly Key Characteristics (KCs) simultaneously. Despite assigning tight tolerances to sub-component manufacture, part variation propagation necessitates expensive …
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Design and Operation of Multi Effect Distillation- Reverse Osmosis based Hybrid Desalination Process. Modelling, Simulation and Optimisation of Design and Operation Parameters of Multi Effect Distillation and Reverse Osmosis Hybrid Desalination Processes for Producing Multi-grade Waters at Minimum Energy and Minimum Cost of Production
… of key performance indicators including water production cost via a repetitive simulation based model. In line of this, the investigation of the lowest water production cost for different numbers of effects of MED system is carried out via optimisation based model. To deploy a sustainable …
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Optimal sublot determination in multiple batch stage, two stage production systems
One of the main objectives in the operation of production systems these days is to reduce production lead time. A reduction in production lead time directly translates into decrement in production cost thereby making the products competitive. One way to achieve this objective is to overlap …
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