Sensitivity Analysis

This study analyses the concept of cost functions for semi-automated Straddle Carrier (SC), Rubber Tyred Gantry (RTG) and automated Rail Mounted Gantry (RMG) container yard operating cranes. It develops a generic cost based model for a pair-wise comparison, analysis and evaluation of economic efficiency and effectiveness of container yard equipment to be used for decision-making by terminal planners and designers. The cost function analysis of this study incorporates major cost attributes used in modern container terminal operations and discussed in the literature. They play a determining role over the total cost of advanced operating systems in a container terminal. The cost model in this study enables the planner and designer of container terminals to make a pair-wise comparison of handling systems to help determine the most appropriate container yard operating system for a port, based on the required technological capabilities and functions. The sensitivity analysis proposed in this study compares and demonstrates the magnitude and intensity of the selected attributes which determine preference of one system over another. The analysis assists a terminal planner in decision-making and selecting a container yard operating system with a minimum operating cost and a maximum annual throughput.

This study analyses the concept of cost functions for semi-automated Straddle Carrier (SC), Rubber Tyred Gantry (RTG) and automated Rail Mounted Gantry (RMG) container yard operating cranes. It develops a generic cost based model for a pair-wise comparison, analysis and evaluation of economic efficiency and effectiveness of container yard equipment to be used for decision-making by terminal planners and designers. The cost function analysis of this study incorporates major cost attributes used in modern container terminal operations and discussed in the literature. They play a determining role over the total cost of advanced operating systems in a container terminal. The cost model in this study enables the planner and designer of container terminals to make a pair-wise comparison of handling systems to help determine the most appropriate container yard operating system for a port, based on the required technological capabilities and functions. The sensitivity analysis proposed in this study compares and demonstrates the magnitude and intensity of the selected attributes which determine preference of one system over another. The analysis assists a terminal planner in decision-making and selecting a container yard operating system with a minimum operating cost and a maximum annual throughput.

The purpose of this study is finding the sensitivity of central bank independence measurements on its impact on inflation in Iran. To this aim different measurements of the central bank independence were calculated using the indices of Grilli et al. (1991), Cukierman et al. (1992), Mathew (2006) and Dumiter (2009) for the period 1961-2012 . Although results of correlation between CBI index and inflation shows that there is a negative correlation between all CBI index and inflation, but the estimated results using the Autoregressive Distributed Lag (ARDL) show except for the index of Grilli et al. (1991) other indices have similar short run and long run significant negative effect on the inflation in Iran. So the CBI have the sensitivity to definition. Also, results of estimation shows that there isn’t any significant differences between the impact of Cukierman et al. (1992), Mathew (2006) and Dumiter (2009) index on the inflation. So this indices can be used interchangeably.

Interval Data Envelopment Analysis (Interval DEA) is a methodology to assess the efficiency of decision-making units (DMUs) in the presence of interval data. Sensitivity analysis and sustainability evaluation of decision- making units are as the most important concerns of Decision Makers (DM). In the past decades, many scholars have been attracted to the sustainability evaluation of DMUs from different perspectives. This study focuses on the sensitivity analysis in DEA and proposes an approach to determine the sustainability radius of the cost efficiency of units with interval data. Potential application of our proposed methods is illustrated by a numerical example from the literature review.

ارزیابی عملکرد برنامه ها و سیاست های اجرا شده برای حل مشکل مسکن شهری، می تواند در بردارنده تجاربی روشن از آثار و پیامدهای سیاست های اجرا شده و نیز معیاری برای ارزیابی امکان سنجی سیاست های جدید باشد. هدف از مقاله حاضر سنجش عملکرد تأمین مسکن طی دو برنامه چهارم و پنجم توسعه در نقاط شهری استان های کشور می باشد. برای این منظور، امتیاز عملکرد 13 شاخص مسکن شهری، در استان های کشور طی سال های 1385 سال شروع برنامه چهارم، 1390 سال پایان برنامه چهارم و 1395 سال پایان برنامه پنجم محاسبه می گردد. در ابتدا شاخص ها از روش بهترین-بدترین (BWM) وزن دهی و سپس برای رتبه بندی و سطح بندی از تکنیک تاپسیس استفاده شده است. نتایج به دست آمده از امتیاز عملکرد مسکن شهری استان های کشور نشان می دهد طی دوره برنامه چهارم وضعیت عملکرد مسکن شهری بهبود یافته است. اما در دوره برنامه پنجم از لحاظ آماری بهبودی حاصل نشده است. هم چنین در بین شاخص های مورد بررسی، شاخص دسترسی به مسکن مهم ترین شاخص می باشد. می توان گفت علیرغم موفقیت نسبی در سیاست های اجراشده در بخش مسکن از لحاظ کالبدی، اما افزایش قیمت مسکن نسبت به درآمد خانوارها، این موفقیت را بی اثر کرده است. از این رو ضروری است با سیاست گذاری های مناسب، برنامه های اجرایی و عملیاتی از برنامه های پنج ساله توسعه تا بودجه ریزی سنواتی در حوزه مسکن اجرایی گردد.