Sharif Digital Repository

The purpose of this research is to optimize the design and manufacture of medical orthoses. In this regard, the business model canvas was used in order to define a general framework for the orthosis system in the cloud. In the cloud, patients are provided with services such as personalized orthoses with lower cost and high speed of sending orthoses (while not having to go back to the lab), as well as providing service for doctors such as information sourcing and full expectations of treatment plan and representing cost effectiveness for laboratory. These values were determined through the business model canvas in the value proposition section. Other important services and requirements in... 

The present research is aimed at providing solutions for the implementation of the concept of lean production in manufacturing companies. As with increasing production, customer orientation, removal of waste and more arrangements, it can be used in the various equipment manufacturing industries (custom). It can be implemented in accordance with the conditions of each company, in order to help the production sector of the country and in order to develop appropriate strategies to improve performance, especially in the field of production, in line with the principles of pure production. Understanding the principles of pure production helps companies while familiarizing themselves with these... 

Kanban is a tool developed by Toyota Motors Corporation to increase productivity and eliminate waste from their large-scale manufacturing processes. Recently, the system has been used as a tool of choice in Lean software development. Kanban system is the inventory stock control system that triggers the signal for production of product based on actual customer requirement.The present thesis is researching the advantages and disadvantages that Kanban system implementation might cause to the material management processes of a manufacturing facility as well as the theoretical and/or practical reasons behind these results. On an empirical level, the research question is analyzed by participating... 

Reconfigurable Manufacturing system (RMS) is used to surge the speed of production and its flexibility of it which is restricted to limited extent. Its flexibility confined to at most that is essential to fabricate the members of a part family. This thesis proposes a novel model for RMS, that, that is a manufacturing framework that is cost-effectively and at the minimum time responses to changesto changes and can fulfill thefulfill marketthe demandmarket demands rapidly. In many researches the minimization of timeof time and cost is the main factors that is making anmake impressionan onimpression projecton the performance of the performanceproject. In the frame offrame theof... 

CIM includes major components with different performances, although in last decades any researchers starting a way to high level of integration in these functions. Process planning and scheduling are two tasks of manufacturing that searches have not paid attention to them. In the other word there is a good environment for integration studies but researchers didn’t find best approach for integrating these two tasks.The proposed approach can quickly integrate these two functions and be implemented in a company without working process planning and scheduling departments separately. This methodology consists of four main modules that introduced in detail in this study. They are Integrated... 

Competitive world of industrial production need more speed and faster reaction for the customer needs. This should be carried out in low cost activities while satisfying what the consumers and customers require. Business of commercial refrigerators and freezers is a big industry targeting small to big customers. In this thesis a systematic method relying on reduction of cost, reworking and unexpected expenditures in product life is utilized. Stands for Design for Manufacturing, DFM is a series of principles and guideline simply to achieve a faultless design of a product so that the non-incurred costs of the product travel through its life cycle become minimized. Freezers and refrigerators... 

Inappropriate effects of fossil fuels and conventional power generation systems on the environment have necessitated a sustainable energy system for the next decade by growing interests in renewable energy systems. The world’s most fast-growing renewable energy resource is the wind energy. The main problem of wind power is the power fluctuations at the load side caused by the variable nature of wind speed, and the main issue in case of remote locations is the long-term storage of power generated by wind turbines. Batteries can be used to store a limited amount of energy for a short time. Although new advances in this field have been achieved, most common type of batteries is hardly able to... 

With advancement of science of aircraft design and limitations of traditional manufacturing methods, using new ones in order to improve efficiency is needed. Among those methods to improve structure efficiency are weight reduction or increase in strength. Increasing strength-to-weight ratio and reduction of weight could be achieved by using composite materials and topology optimization respectively. Manufacturing such parts with efficient design using traditional methods is hard or impossible. Additive manufacturing as a new technology which is being developed every day, can be a big help to aerospace industry. Considering the importance of strength-to-weight ratio in aerospace industry and... 

In various industries such as aerospace, biomedicine and automobile manufacturing, they seek to manufacture light parts with complex geometry and acceptable mechanical properties. Additive manufacturing processes have gained a special place in the field of rapid prototyping, reverse engineering, mold production, etc. brought It is very important to know the mechanical properties, especially the fatigue behavior of the parts obtained by this method. In this research, the stress-fatigue life graph of parts made of Ti-6Al-4V (grade 5), which is one of the most widely used alloys in aerial structures, was extracted by selective laser melting. For this purpose, several standard fatigue test... 

Hand-launched UAVs are type of unmanned aerial vehicles that due to transportability and geometric specification, are operationally valuable and worthy. reconnaissance & surveillance (aerial mapping, aerial filming, inspection, border protection); health care (blood transport, body organ transport, medicine delivery); agriculture (farm monitoring, fertilization, cloud seeding); payload delivery (envelopes posting); network covering (internet supply, telecommunication relay); crisis management (remote area medical) are some of typical applications and missions of this type of aircrafts. These UAVs have almost low altitude short endurance (below 5000 ft. and less than 2 hrs.). To extend their... 

The per capita income and welfare levels of countries around the world vary significantly from each other. Identifying the factors that lead to differences in the per capita income of countries as well as their welfare levels is a major concern for economists. Studies conducted in this field indicate that one of the main sources of these differences is the significant disparity in the total factor productivity (TFP) across countries. Suboptimal resource allocation is one of the most influential factors affecting TFP in countries. The primary importance of investigating misallocation in the Iranian economy is that, in line with the decrease in economic growth, the growth rate of industrial... 

This research aims to explore the effectiveness of past tariff evolutions in shaping firms' response to current input prices. Additionally, it investigates how asymmetric fuel pricing across different industries influences overall industry efficiency and prosperity. Furthermore, the study examines the impact of fuel subsidies on the equilibrium distribution of companies independent of welfare decline. In Chapter 1, utilizing microdata from Iranian industrial workshops between 1386-1396 (2007-2017) A key finding is that new firms exhibit a significant and stronger reaction to energy price variations compared to other firms when it comes to technology choices.Chapter 2 presents a structural... 

This study aims to investigate how different factors contribute to misallocation of physical capital in the Iranian economy. This is achieved by using a general equilibrium model with adjustment costs, uncertainty, and heterogeneity in firms' market power and technologies. In order to calculate the role of each factor in the observed misallocation, we need to estimate the parameters of this model using the Generalized Method of Moments. The data comes from the Annual Survey of Manufacturing Establishments from 2003 to 2013. According to the results, adjustment costs, heterogeneity in production functions, and heterogeneity in market power can explain about 80% of capital misallocation in... 

This study examines the effect of working capital financing on the performance of Iranian manufacturing establishments in the credit crunch of 1387 (2008). The identification strategy for this study is comparison of ex-ante features and ex-post performance using instrumental variable (IV) regression. This IV regression, by controlling other determinants of dependence on working capital (domestic demand, exports and imports) and considering credit crunch indicator, can provide an unbiased and consistent estimation impact of working capital channel in credit crunch. This study uses a sample from "Annual Survey of Iranian Manufacturing Establishments" that includes 95512 observations and 28859... 

A study of the market of industrial products in Iran shows that despite having potential capacities, natural resources, an educated and capable workforce and companies capable of presenting competitive industrial products, most of the Iranian market for consumer and industrial products belong to foreign companies.In this thesis, the question of why a great share of industrial products is imported despite the existence of capable domestic producers, is studied.In order to answer this question, the business ecosystem for producers of industrial products is studied. Electric motors, which have a wide range of uses various industries and have a large market in Iran and abroad, were chosen as a... 

The thesis attempts to investigate one of the factors influencing enterprise innovation, namely, innovation cooperation, its types and its diversity by using the data of about 2,500 companies in different fields of industry of national innovation survey that had been collected in 1395 hijri. In this research, firstly, by reviewing the literature on the field of innovative cooperation and the performance of enterprise innovation, the model of the association of colleagues with innovation performance has been extracted. In the following, it answers to this question is whether the cooperation with colleagues is essentially affecting the innovation performance of Iranian firms or not? The... 

Competitive pressures force manufacturers to continuously improve the provision of products and associated services desired by customers. One of the most comparative industries in the world is automotive industry. Since the advent, these industries have tried to use new tools for better management. So, tools such as lean production were developed in these industries. The lean production was considered by many productive industries. The TOYOTA Company which is now one of the giant car makers implements well the lean production. More or less the Iranian automotive industries have also considered this parameter. One of these Iranian industries is Iran khodro Company. As many competitors adopted... 

The aim of this research was estimation of investment-specific technological change, using industrial database which is published annually by Bureau of Statistics of Iran. Investment-specific technological change is the quality improvement of investment in capital goods during the time. Before estimation of this rate, production function (regarding 130 industrial activities and during 14 years, 1994-2007) was estimated. All industries classified in 4 groups based on the level of technology used in them. Then factor’s production elasticities were compared between different groups of industries. The results showed that in high-tech industries the elasticities of skilled workers, import and... 

Government intervention in markets may go beyond the market regulation. Interventions may cause some idiosyncratic price distortions. It means the relative prices of factors to become different among firms. Therefore, micro conditions for firms will be changed. These will result in misallocation of factor production between firms and change in manufacturing TFP. According to data from about 14000 medium and small industrial firms in Iran, removing misallocation of production factors (capital and energy) and output idiosyncratic distortions between industrial firms would result in 115 percent increase in manufacturing TFP.

 

The downscaling of feature size and higher process variation in COMS nano-technology are anticipated to introduce higher manufacturing anomalies. On the other hand, designs are getting more complicated due to more innovative applications where they need higher numbers of transistors. Because of these issues, integrated circuits manufacturing has become more complicated than before. Complexity in manufacturing process increases the probability of the defects in chips. This phenomenon reduces the fabrication yield. Conventional methods like fault tolerant techniques, defect tolerant techniques and redundancy are not separately good enough for improving manufacturing yield. On the other hand,...