...failures”, the author, Robert X Perez, explains through his own experience as a senior reliability engineer at Citgo Petroleum Corporation, and through examples of various events in different systems the importance of finding the root cause(s) of failures in rotating equipment. The author explains these “major failures causing significant undesired events are the result of a series of events, and compares it to the reaction of a domino line being tipped over by a single domino chip. And studying chain of event, or probable scenarios is at the heart of RFCA’s” (Perez) The author focuses on FTA (Fault tree analysis) as a tool to determine such root causes. And gives examples of cases where use of these tools could have OR have prevented multiple damages due to one component failure causing failure in surrounding components. RCFA – Root Cause Failure analysis “Root Cause Failure analysis is a structured process to identify any physical, human and latent causes of undesirable event(s).And how such a process can be used in achieving continuous plant reliability improvements by targeting mechanical and organizational deficiencies in a process facility” (Perez). A tool for “Identification and correction of the underlying problem”(Tronskar). “Simply stated, RCFA is a tool designed to help identify not only what and how an event occurred, but also why it happened. Only when investigators are able to determine why an event or failure occurred will they be able to specify workable corrective...
Words: 1529 - Pages: 7
...Introduction 3 2. Executive Summary 5 3. Data Preprocessing 6 4. Analysis 8 4.1 Data Partition 8 4.2 Stat Explore 10 4.3 Clustering & Segmentation: 12 4.4 Decision Tree 24 4.5 Interactive Decision Tree 28 4.6 Gradient Boosting 33 4.7 Linear Regression 35 4.8 Neural Network 38 4.9 Compare Models 40 4.10 Score New Data 42 4.11 Logistic Regression 44 5. Conclusion 49 1. Introduction Given the complexity and the large extent of the interdependencies between airports, aircraft, passengers, airlines, control centers, etc. of the national aviation system, flight delays occur frequently. Recently, the OAG Flight Status database reported that over 4.6 million flights arrived more than 15 minutes late at their destination; a conservative average of 80 passengers per flight equates to about 368 million passengers being inconvenienced. Inspired by this, our term paper predicts the delay in flights of some of the players in the U.S. Airlines Industry and the impact of the flight delays to improve their performance (July 2014 to June 2015). DATA SOURCE The secondary data source we will use is available under Airline On-time Statistics on the TranStats website of the Bureau of Transportation Statistics as our source of data. We extracted information for specific carriers from all major airports during a particular time period. For the purpose of our analysis, we restricted the scope of our study to focus on the arrivals in time period...
Words: 3404 - Pages: 14
...----------------------- Energy Trace Barrier Analysis (ETBA) – Qualitative analysis technique used to identify hazards by tracing energy flow into, thru, & out of a system. “Energy hazard” is defind as an energy source tht adversely impacts an unprotectd or vulnerable target. Assessment is conductd by following the energy path to determine if adequate controls are in place to assure undesird energy release does not occur.– Energy flow is tracd through the system operation & energy transfer points are identifid– Barriers to ento energy flow are evaluatd to determine adequacy • ETBA process can be applied at any stage of the project lifecycle & can be very useful for:– Systems design –Developing procedures(e.g., lockout--‐tagout). – Planning/judging operational readiness. – During mishap investigation or making “safe--‐to--‐enter” decisions at mishap sites. ETBA Approach • Examine system & identify all energy sources • For each energy source, trace its path through the system • Identify all targets tht could be vulnerable to the energy source • Identify all barriers in the energy flow path • Determine if existing controls are adequate. Energy Source– any material, mechanism, or process tht contains potential energy tht can be releasd •Electrical •Mechanical •Chemical •Radiation• Sonic• Thermal• Nuclear• Pneumatic• Hydraulic• Others Energy barrier --‐ any design or administrative method tht prevents energy from being releasd or prevents a hazardous energy source from reaching a...
Words: 2026 - Pages: 9
...Need help? ☎ 0115 966 7955 ------------------------------------------------- Top of Form Bottom of Form * * Services * Instant Price * Order Now * Essays * Dissertations * Quality * Contact * Account You are here: UK Essays » Essays » Business » Memo Providing Recommendations For Shuzworld Business Essay Print Email Download Reference This Send to Kindle Reddit This Memo Providing Recommendations For Shuzworld Business Essay In order to find out the most cost-effectively decision, Shuzworld is considering the possibility of opening a new store on route 20, just outside of Auburn, referred to as the stand-alone option. The second option is opening a store in the Auburn Mall, and the third is not opening a store at all. To do nothing now, and wait for a better time to move in to the market. Shuzworld is also considering purchasing market research. I recommend that Shuzworld should use the decision tree graphical method, because of the nature of the issue (a graphic manner was asked to be used). A very important reason to why I am recommending this tool, is because the decision tree method is most commonly used for this kind of cases, as the Shuzworld presented case. The profitability problem is one of the most important problems of future profitability when opening a new store process and is the important content of the course of operation management. By recommending the use of this crucial tool, we need to understand, that this...
Words: 6791 - Pages: 28
...http://vk.com/caseogolics CASE INTERVIEW SECRETS A FORMER MCKINSEY INTERVIEWER REVEALS HOW TO GET MULTIPLE JOB OFFERS IN CONSULTING VICTOR CHENG Innovation Press Seattle This book and the information contained herein are for informative purposes only. The information in this book is distributed on an as-is basis, without warranty. The author makes no legal claims, express or implied, and the material is not meant to substitute legal or financial counsel. The author, publisher, and/or copyright holder assume no responsibility for the loss or damage caused or allegedly caused, directly or indirectly, by the use of information contained in this book. The author and publisher specifically disclaim any liability incurred from the use or application of the contents of this book. All rights reserved. No part of this book may be reproduced or transmitted in any form by any means, including electronic, mechanical, photocopy, recording, or otherwise, without the prior written permission of the publisher. Throughout this book, trademarked names are referenced. Rather than using a trademark symbol with every occurrence of a trademarked name, we state that we are using the names in an editorial fashion only and to the benefit of the trademark owner, with no intention of infringement of the trademark. Copyright © 2012 Victor Cheng All rights reserved. Published by Innovation Press 93 S. Jackson St., #75551, Seattle, WA 98104 ISBN 978-0-9841835-3-1 For Julia and the girls FREE BONUS...
Words: 71202 - Pages: 285
...Safety Analysis of a High Voltage Test Lab by David Wallace for ISE 6173 Instructor: Dr. Kari Babski-Reeves Spring 2015 ABSTRACT In the production of electrical transformers, dielectric test must be performed to certify the transformer will function properly in the field. These tests are conducted in a high voltage test lab (HVTL) where voltages can reach in excess of 500,000 volts. This health and safety assessment was performed on a HVTL to identify potential safety and health hazards within the lab and apply engineering controls, administrative controls and personal protective equipment to mitigate the hazard. This assessment was accomplished through the use of risk assessment, deviation analysis, job safety analysis, HAZOP and fault tree analysis following a five step method. Each hazard was quantified based on the consequence and the probability of occurring and classified based on the type of risk and the acceptance of the risk. From this analysis, the ten most critical hazards were chosen. These ten were then mitigated using the various controls listed above. * TABLE OF CONTENTS ABSTRACTii INTRODUCTION1 METHODS2 2.1 Safety and Health Analysis Tools2 2.1.1 Risk Assessment Analysis2 2.1.2 Deviation Analysis3 2.1.3 Job Safety Analysis5 2.1.4 Hazard and Operability Analysis5 2.1.5 Fault Tree Analysis6 2.2 Procedures for Five-Step Analysis6 2.2.1 Risk Assessment Analysis of Building and Facility7 2.2.2 Deviation Analysis of Hazardous Substances7 2.2.3 Job Safety Analysis...
Words: 5236 - Pages: 21
...HEALTH, SAFETY AND ENVIRONMENT TITLE: FRACTIONAL DISTILLATION PROCESS CONTENTS 1. Title………………………………………………………………………….1 2. Summary…………………………………………………………………….3 3. Introduction of Case Study…………….…………………………………….4 4. Risk Scenario Development…….…………………………………………...5 5. Justification of Fault Tree Analysis…………………………………………6 6. Procedures of Fault Tree Analysis…………………………………………..7 7. Fault Tree Analysis…………………………………………………………8 8. Possible Risk Associated with Hazards….………………………………...11 9. Accident Consequences…………………………………………………….13 10. Method to Control the Risk………………………………………………...15 11. Solution to Minimize the Risk……………………………………………..17 12. Conclusion………………………………………………………………….18 13. References………………………………………………………………….19 SUMMARY Figure 1: Fractioning Column (Copyright of science-resources.co.uk, 2009) Figure 1: Fractioning Column (Copyright of science-resources.co.uk, 2009) Crude oil is one the most important non-renewable sources on Earth. Demand for this black viscous liquid is growing every day in this era if modern technology. Electricity, vehicles and synthetics are among the major consumers of petroleum fluids or crude oil. Crude oil could be referred to as the ‘black gold’ due to its expensive price and complicated production process. Unlike gold, crude oil naturally is useless in its primary form. A process called fractional distillation or petroleum refining need to be carried out onto the crude oil to separate...
Words: 4500 - Pages: 18
...Ateneo de Davao University School of Business and Governance Entrepreneurship Department Progressive Insurance: A Case Study Submitted to: Mr. Rey Navacilla Submitted by: John Paul Dela Vega Jose Antonio Kintanar Clarence Mitchell Sy Dayle Lois Tulang John Way Keith Medina Table of Contents I. Introduction…………………………………………………..…… II. Statement of the Problem…………………………………..…... III. Objectives of the Case Study………………………………..…. IV. Methodologies and Approaches…………………………….… V. Analysis of the Case a. Qualitative Tool: Fishbone Diagram………….…. b. Quantitative Tool: Decision Tree Analysis……. VI. Alternative Courses of Action (ACAs) c. Alternative Course 1……………………………..… d. Alternative Course 2……………………………….. e. Alternative Course 3……………………………..… VII. Significant Findings…………………………………………….. f. Positive Findings…………………………………… g. Negative Findings………………………………….. VIII. Recommendations…………………………………………….... IX. Conclusions……………………………………………………… I. Introduction Progressive Insurance, an automobile insurer company, which is based in Mayfield Village, Ohio. On the year of 1991 Progressive Insurance had approximately $1.3 Billion in their sales. When the year of 2006 came that $1.3 Billion in sales suddenly became $14.5 Billion. What did they do to make this figures increase so high? Nothing. For 15 years Progressive insurance just did little advertising...
Words: 2124 - Pages: 9
...COMPILER DESIGN LECTURE NOTES UNIT -1 1.1 OVERVIEW OF LANGUAGE PROCESSING SYSTEM 1.2 Preprocessor A preprocessor produce input to compilers. They may perform the following functions. 1. Macro processing: A preprocessor may allow a user to define macros that are short hands for longer constructs. 2. File inclusion: A preprocessor may include header files into the program text. 3. Rational preprocessor: these preprocessors augment older languages with more modern flow-of-control and data structuring facilities. 4. Language Extensions: These preprocessor attempts to add capabilities to the language by certain amounts to build-in macro 1.3 COMPILER Compiler is a translator program that translates a program written in (HLL) the source program and translate it into an equivalent program in (MLL) the target program. As an important part of a compiler is error showing to the programmer. Source pgm Compiler Error msg target pgm Department of CSE -2- Executing a program written n HLL programming language is basically of two parts. the source program must first be compiled translated into a object program. Then the results object program is loaded into a memory executed. Source pgm Compiler obj pgm Obj pgm input Obj pgm opj pgm output 1.4 ASSEMBLER: programmers found it difficult to write or read programs in machine language. They begin to use a mnemonic (symbols) for each machine instruction, which they would subsequently translate into machine language. Such...
Words: 14721 - Pages: 59
...Dollar Tree is the nation’s largest single price point retail with over 3300 stores across the United States. It has faced several issues that have led to organizational and leadership problems. 1. What are the chief elements of the strategy that “Dollar Tree” is pursuing? The chief elements important in this article are all related to the fact that the company was moving towards expanding the business and creating a competitive advantage. As the article says, the business grows so much that by 2009, there were over 33000 retail stores and 12 distribution centers. The chief elements are as follow: - To enter new geographic markets. - To gain sales and market share with lower costs. - Adhering to policies and procedures and making changes when needed. 2. What are the elements of “Dollar Tree” ’s Business Model? There are 2 elements in the Business Model of Dollar Tree, which are Customer Proposition Value and Profit Formula. Customer Proposition value lays out how the company is going to satisfy customer needs at a price the customer will consider a good value. In the case of Dollar Tree’s company one dollar for all products they offer is both a good value for the price they pay, and satisfying. Profit Formula describes how the company is going to determine a cost structure that will provide profits. Dollar Tree company, in order to keep up with competition, has to purchase very aggressively when products of extreme value come their way, even if it means overloading...
Words: 1551 - Pages: 7
...NcPred for accurate nuclear protein prediction using n-mer statistics with various classification algorithms Md. Saiful Islam, Alaol Kabir, Kazi Sakib, and Md. Alamgir Hossain Abstract Prediction of nuclear proteins is one of the major challenges in genome annotation. A method, NcPred is described, for predicting nuclear proteins with higher accuracy exploiting n-mer statistics with different classification algorithms namely Alternating Decision (AD) Tree, Best First (BF) Tree, Random Tree and Adaptive (Ada) Boost. On BaCello dataset [1], NcPred improves about 20% accuracy with Random Tree and about 10% sensitivity with Ada Boost for Animal proteins compared to existing techniques. It also increases the accuracy of Fungal protein prediction by 20% and recall by 4% with AD Tree. In case of Human protein, the accuracy is improved by about 25% and sensitivity about 10% with BF Tree. Performance analysis of NcPred clearly demonstrates its suitability over the contemporary in-silico nuclear protein classification research. 1 Introduction Nucleus, popularly known as the control center of a cell, is the central unit of eukaryotic cells [2]. Unlike other organelles, its function is regulated by two genomes due to the presence of an explicit nuclear genome. It performs a plethora of biochemical reactions like oxidative phosphorylation, Krebs cycle, DNA replication, transcription, translation, etc. In addition nuclei are also involved in apoptosis and ionic homeostasis [3]. Because...
Words: 3249 - Pages: 13
...Tutorial on Classification Igor Baskin and Alexandre Varnek Introduction The tutorial demonstrates possibilities offered by the Weka software to build classification models for SAR (Structure-Activity Relationships) analysis. Two types of classification tasks will be considered – two-class and multi-class classification. In all cases protein-ligand binding data will analyzed, ligands exhibiting strong binding affinity towards a certain protein being considered as “active” with respect to it. If it is not known about the binding affinity of a ligand towards the protein, such ligand is conventionally considered as “nonactive” one. In this case, the goal of classification models is to be able to predict whether a new ligand will exhibit strong binding activity toward certain protein biotargets. In the latter case one can expect that such ligands might possess the corresponding type of biological activity and therefore could be used as ‘’hits” for drug design. All ligands in this tutorial are described by means of an extended set of MACCS fingerprints, each of them comprising 1024 bits, the “on” value of each of them indicating the presence of a certain structural feature in ligand, otherwise its value being “off”. Part 1. Two-Class Classification Models. 1. Data and descriptors. The dataset for this tutorial contains 49 ligands of Angeotensin-Converting Enzyme (ACE) and 1797 decoy compounds chosen from the DUD database. The set of "extended" MACCS fingerprints is used as...
Words: 5674 - Pages: 23
...original built by William the Conqueror in 1068. Warwick is the county town of Warwickshire, England, situated on a bend of the River Avon. The original wooden motte-and-bailey castle was rebuilt in stone in the 12th century. During the Hundred Years War, the facade opposite the town was refortified, resulting in one of the most recognisable examples of 14th century military architecture. It was used as a stronghold until the early 17th century, when it was granted to Sir Fulke Greville by James I in 1604. Sir Fulke Greville converted it to a country house. It was owned by the Greville family, who became earls of Warwick in 1759, until 1978 when it was bought by the Tussauds Group. According to the case study, Warwick Castle has the paid admissions reaching 685,000 and is in the top 5 sites have the most in England. Although Warwick is a famous destination to visit, but it has many problems about management and those problems seriously affect to the tourist activities. Executive Summary: This report provides Business Description: 1. Business Overview * Location: Warwick Castle UK is noted as one of the finest medival castles in England and now consider as one of the sought after tourist destinations. Warwick is a great place to visit and experience. Warwick Castle is situated in the town of Warwick, on a sandstone bluff at a bend of the River Avon. The river, which runs below the castle on the east side, has eroded the rock the castle stands on, forming a cliff. Because...
Words: 885 - Pages: 4
...management plan in place. This would involve meetings to clearly define the scope of the project. A second bridge and its usefulness, cost, and scheduling will be primary factors of interest. But another area would be in the enterprise environmental factors. These factors specifically are organizational structure, government/industry standards, infrastructure*, existing human resources, company work authorizations, stakeholder risks, and project information systems. The meetings would be to ensure that the risk management plan was consistent with the scope and in alignment with the desired results. It would also allow for brainstorming, document reviews, the Delphi technique, interviewing of key stakeholders, SWOT analysis, risks checklists, assumption analysis, diagramming techniques, cause and effect, and influence diagrams. Next, would be the process to meet to discuss the risks attributed with the management areas. The risks to scope, schedule, and cost. Considering the past project as a lessons learned, there were benefits that could be utilized that can limit the risks. The risks particularly associated with the second Oresund Bridge project is in its infrastructure. There are presently 4 lanes roadway and a two way railway with tunnels connected. With the current infrastructure, design, strategy, and logistics are all sure to be risks laden. We would need to have worked through all alternatives in this process to the strategy of adding to an already stellar structure...
Words: 2042 - Pages: 9
...Ansys Workbench Basics Guide Suhail Mahmud and Mohamad Wissam Ansys Workbench Basics Guide Suhail Mahmud Mostafa Mohamad Wissam Farhoud December - 2013 1 Ansys Workbench Basics Guide Suhail Mahmud and Mohamad Wissam Abstract With the emerging importance of CFD and finite element analyses, it is of great necessity that engineering students get a good base of knowledge on one of the most used software packages in the industry of simulation, ANSYS. This brief tutorial states a few simple examples of the main applications of the software package ANSYS and highlights some of the possible problems students may face during their journey in discovering this application. The flow of information is structured that the reader gets an understanding of how important ANSYS is, and how it works and what type of machines are needed for the student level research expected. Then the tutorial goes on with simple straight forward examples of structural and fluid physics simulated using the ANSYS package. Eventually, the tutorial addresses the most important problems generally faced by the students such as unsuccessful meshing, or divergent solutions. Disclaimer It is extremely important to note two points while following this tutorial: The knowledge contained in this paper is by no means, accepted as mainstream, or an industry best practice. It is merely the product of the experience of senior engineering students who explored the program and desired to share their experience...
Words: 8637 - Pages: 35
