The effectiveness of the Business Intelligence(BI)system mainly depends on the quality of knowledge it produces.The decision-making process is hindered,and the user’s trust is lost,if the knowledge offered is undesir...The effectiveness of the Business Intelligence(BI)system mainly depends on the quality of knowledge it produces.The decision-making process is hindered,and the user’s trust is lost,if the knowledge offered is undesired or of poor quality.A Data Warehouse(DW)is a huge collection of data gathered from many sources and an important part of any BI solution to assist management in making better decisions.The Extract,Transform,and Load(ETL)process is the backbone of a DW system,and it is responsible for moving data from source systems into the DW system.The more mature the ETL process the more reliable the DW system.In this paper,we propose the ETL Maturity Model(EMM)that assists organizations in achieving a high-quality ETL system and thereby enhancing the quality of knowledge produced.The EMM is made up of five levels of maturity i.e.,Chaotic,Acceptable,Stable,Efficient and Reliable.Each level of maturity contains Key Process Areas(KPAs)that have been endorsed by industry experts and include all critical features of a good ETL system.Quality Objectives(QOs)are defined procedures that,when implemented,resulted in a high-quality ETL process.Each KPA has its own set of QOs,the execution of which meets the requirements of that KPA.Multiple brainstorming sessions with relevant industry experts helped to enhance the model.EMMwas deployed in two key projects utilizing multiple case studies to supplement the validation process and support our claim.This model can assist organizations in improving their current ETL process and transforming it into a more mature ETL system.This model can also provide high-quality information to assist users inmaking better decisions and gaining their trust.展开更多
Discussing the matter of organizational data management implies, almost automatically, the concept of data warehousing as one of the most important parts of decision support system （DSS）, as it supports the integrat...Discussing the matter of organizational data management implies, almost automatically, the concept of data warehousing as one of the most important parts of decision support system （DSS）, as it supports the integration of information management by aggregating all data formats and provisioning external systems with consistent data content and flows, together with the metadata concept, as one of the easiest ways of integration for software and database systems. Since organizational data management uses the metadata channel for creating a bi-directional flow, when correctly managed, metadata can save both time and resources for organizations. This paperI will focus on providing theoretical aspects of the two concepts, together with a short brief over a proposed model of design for an organizational management tool.展开更多
This paper analyzes the main characteristics, benefits, and disadvantages of existing traditional ETL （extraction, transformation, loading） methods, and summaries some factors affecting the performance of ETL tools....This paper analyzes the main characteristics, benefits, and disadvantages of existing traditional ETL （extraction, transformation, loading） methods, and summaries some factors affecting the performance of ETL tools. Then, a new ETL approach, E-LT （extraction, loading and transformation）, is proposed. The E-LT approach applies database mapping technique to realize that loading stage and transformation stage in the ETL process are performed at the same time after the extraction stage. Thus, it can use SQL commands to complete loading and transformation processing, and eliminates the staging area before loading in traditional ETL process. The framework of an ETL engine based on E-LT method is presented. The ETL process including initial loading and incremental refreshment is discussed in detail, and the SQL-based algorithm for initial loading is presented. The performance of E-LT method on loading throughout outperforms some commercial ETL approaches by experimental proof and theoretical analysis. At last, a real case in marine data warehousing of the E-LT method is discussed for illustrating the validity of the proposed method.展开更多
数据抽取、转换和装载(Extraction,Transformation and Loading,简称ETL)是数据仓库化的关键环节,对数据仓库数据质量有着至关重要的影响。随着信息化的发展,ETL已经成为当前较活跃的研究领域之一,但是ETL理论和技术的发展还不成熟。针...数据抽取、转换和装载(Extraction,Transformation and Loading,简称ETL)是数据仓库化的关键环节,对数据仓库数据质量有着至关重要的影响。随着信息化的发展,ETL已经成为当前较活跃的研究领域之一,但是ETL理论和技术的发展还不成熟。针对当前ETL研究中存在的一些问题和需要考虑的各种因素,从ETL各个阶段存在的主要问题出发,列举了各种研究方法及研究成果,并进行了分析。最后,总结并提出了ETL的未来研究方向和今后工作的建议。展开更多
基金King Saud University for funding this work through Researchers Supporting Project Number(RSP-2021/387),King Saud University,Riyadh,Saudi Arabia.
文摘The effectiveness of the Business Intelligence(BI)system mainly depends on the quality of knowledge it produces.The decision-making process is hindered,and the user’s trust is lost,if the knowledge offered is undesired or of poor quality.A Data Warehouse(DW)is a huge collection of data gathered from many sources and an important part of any BI solution to assist management in making better decisions.The Extract,Transform,and Load(ETL)process is the backbone of a DW system,and it is responsible for moving data from source systems into the DW system.The more mature the ETL process the more reliable the DW system.In this paper,we propose the ETL Maturity Model(EMM)that assists organizations in achieving a high-quality ETL system and thereby enhancing the quality of knowledge produced.The EMM is made up of five levels of maturity i.e.,Chaotic,Acceptable,Stable,Efficient and Reliable.Each level of maturity contains Key Process Areas(KPAs)that have been endorsed by industry experts and include all critical features of a good ETL system.Quality Objectives(QOs)are defined procedures that,when implemented,resulted in a high-quality ETL process.Each KPA has its own set of QOs,the execution of which meets the requirements of that KPA.Multiple brainstorming sessions with relevant industry experts helped to enhance the model.EMMwas deployed in two key projects utilizing multiple case studies to supplement the validation process and support our claim.This model can assist organizations in improving their current ETL process and transforming it into a more mature ETL system.This model can also provide high-quality information to assist users inmaking better decisions and gaining their trust.
文摘Discussing the matter of organizational data management implies, almost automatically, the concept of data warehousing as one of the most important parts of decision support system （DSS）, as it supports the integration of information management by aggregating all data formats and provisioning external systems with consistent data content and flows, together with the metadata concept, as one of the easiest ways of integration for software and database systems. Since organizational data management uses the metadata channel for creating a bi-directional flow, when correctly managed, metadata can save both time and resources for organizations. This paperI will focus on providing theoretical aspects of the two concepts, together with a short brief over a proposed model of design for an organizational management tool.
基金Supported by the National Natural Science Foundation of China (60673139, 60573090)
文摘This paper analyzes the main characteristics, benefits, and disadvantages of existing traditional ETL （extraction, transformation, loading） methods, and summaries some factors affecting the performance of ETL tools. Then, a new ETL approach, E-LT （extraction, loading and transformation）, is proposed. The E-LT approach applies database mapping technique to realize that loading stage and transformation stage in the ETL process are performed at the same time after the extraction stage. Thus, it can use SQL commands to complete loading and transformation processing, and eliminates the staging area before loading in traditional ETL process. The framework of an ETL engine based on E-LT method is presented. The ETL process including initial loading and incremental refreshment is discussed in detail, and the SQL-based algorithm for initial loading is presented. The performance of E-LT method on loading throughout outperforms some commercial ETL approaches by experimental proof and theoretical analysis. At last, a real case in marine data warehousing of the E-LT method is discussed for illustrating the validity of the proposed method.
文摘数据抽取、转换和装载(Extraction,Transformation and Loading,简称ETL)是数据仓库化的关键环节,对数据仓库数据质量有着至关重要的影响。随着信息化的发展,ETL已经成为当前较活跃的研究领域之一,但是ETL理论和技术的发展还不成熟。针对当前ETL研究中存在的一些问题和需要考虑的各种因素,从ETL各个阶段存在的主要问题出发,列举了各种研究方法及研究成果,并进行了分析。最后,总结并提出了ETL的未来研究方向和今后工作的建议。
