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Contemporary Quality Management Control Chart
Ibrahim Bedane,
Terefe Jima
Issue:
Volume 5, Issue 2, December 2021
Pages:
28-33
Received:
24 December 2020
Accepted:
29 July 2021
Published:
27 August 2021
Abstract: Quality always has been an integral part of virtually all products and services. It is continuously meeting exceeding customer and supplier needs, requirements and expectations in all aspects. However, our awareness of its importance and the introduction of formal methods for quality control and improvement have been an evolutionary development. This article present Core concepts of contemporary quality management Quality Control techniques Control Chart to measure, analyze and control quality by continuously monitoring, controlling and managing process maintaining sampling to continuously Improvable targets by continuously producing and offering services within low and lower Percentage Defectives in meeting exceeding customer and supplier needs, requirements and expectations. Sampling, Sample size and sample numbers of Proportion of population covered with sampling Rational sub group, are two basic for quality monitoring and control to manage quality of products as well as services within Continuously improving tolerable number and/or Percentage Defectives. To monitor the quality characteristics of a process, appropriate Control chart used in quality management capable of showing the evolution over time of the behavior of the quality characteristics and detecting situations that seem to present certain anomalies must be used. Thus, This Article deals with the application of selected Quality Management and propose Control chart based on Sample size and sample numbers of sampling Rational sub group and Proportion of population covered with γ% Confidence of sample size n to monitor process using number of defectives, through which we can achieve continuous quality improvement. In this paper, Control chart involves using statistical and mathematical techniques were used to measure and analyze the variation in processes intent to monitor product quality and maintain processes to fixed targets. this article show how to use proposed control charts to monitor discrete data and present the assumptions behind the charts, their application, and their interpretation to measure, analyze and control quality by monitoring and managing quality maintaining processes to continuously Improvable targets to manufacture a product as designed within low and lower Percentage Defectives. The advantage of these tools is that they can identify the effects of the processes that cause unnatural variability in processes that result of Defectives and poor quality in offering services within low and lower Percentage Defectives in meeting exceeding customer and supplier needs.
Abstract: Quality always has been an integral part of virtually all products and services. It is continuously meeting exceeding customer and supplier needs, requirements and expectations in all aspects. However, our awareness of its importance and the introduction of formal methods for quality control and improvement have been an evolutionary development. Th...
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Influential Factors for Undertaking BPR on Construction Industry to Improve Contractors Performance in Tanzania
Issue:
Volume 5, Issue 2, December 2021
Pages:
34-45
Received:
24 July 2021
Accepted:
20 August 2021
Published:
31 August 2021
Abstract: The construction business in Tanzania has been acknowledged to face an increased competition resulting from globalization. Correspondingly, the construction business has occupied incredibly & everlasting challenges flabbergasted with time & cost overrun, insignificant quality, poor safety, and ecological unsustainability leading to inadequate general performance. The challenges have compelled most construction firms to become innovative to redesign the business and adopt the change approaches. The innovation approach has established and engaged the extra efforts and a persistent follow-up to attain the practicable and worthwhile resolution. Business Process Reengineering (BPR) has been touted as a propitious strategic management practice and a management change approach for attracting, elevating the competences & efficiencies, bringing great solutions and gaining a competitive advantage for construction business dramatic improvement. An exhaustive literature review, an in-depth interview, and a descriptive quantitative research tactic were assumed for this study to gather an opinion from 202 experienced experts that helped to attain the findings. SPSS-AMOS software was applied during data analysis to obtain the descriptive, inferential statistics and a structural model as findings to support the study conclusion. However, the identified BPR factors could help provide alternative thinking of influencing undertaking BPR on the construction industry to improve construction business performance in Tanzania.
Abstract: The construction business in Tanzania has been acknowledged to face an increased competition resulting from globalization. Correspondingly, the construction business has occupied incredibly & everlasting challenges flabbergasted with time & cost overrun, insignificant quality, poor safety, and ecological unsustainability leading to inadequate gener...
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Application of High Tensile (E-550 Grade) Structural Plates for Built-up Columns and Beams in Boiler Structure
Brajesh Kumar Chaurasia,
Ajay Sharma,
Aditya Singh
Issue:
Volume 5, Issue 2, December 2021
Pages:
46-51
Received:
23 August 2021
Accepted:
22 September 2021
Published:
12 October 2021
Abstract: In the past Boiler Structure has been designed using mainly carbon steel plates of Grade E250 or E350. This paper presents and analyses the application of High Tensile steel (E550 Grade as per IS: 2062) in Heavy structure like Boiler Supporting Steel Structure. Boiler supporting Structure consists of major weight contribution in Columns and Beams which are stress governed, the objective is to optimize the structural quantity through application of High Tensile Steel with higher yield stress. This paper describes the complete analytical approach adopted in analysis & design, conclusion and recommendation. Latest structural plate rolling technology provides excellent combination of high strength, Toughness and weldability for High Tensile Steel, these properties of steel plate are most critical mechanical properties for steel structure design. The key microstructural control is obtained in the plate rolling mills through on-line heat treatment immediately after accelerated cooling during Thermo-Mechanical Controlled Processing (TMCP). Thermo-Mechanical Controlled Processing technology is recent development applied in latest steel structural plate rolling mills for rolling with thickness up to 120mm. Niobium (Nb) as a micro alloy in the steel enables to achieve a substantial grain refinement, very fine-grained microstructure improves toughness and increases the yield strength. The TMCP process enables the required tensile properties in structural plates with leaner chemical composition. Leaner chemical composition, especially lower carbon content and lower carbon equivalents improves weldability. Improved weldability benefits the fabricator for fabrication of plate fabricated built-up profiles which is the main requirement in Heavy Structure like Boiler Supporting Steel Structure. Detailed analysis and design of typical 660 MW coal fired Boiler structure has resulted in 25% structural weight saving in case of High Tensile steel application (E550 Grade) as compared with commonly used carbon steel (E250/E350 Grade). Also, this analysis concludes that use of high tensile steel should be limited to Columns and Beams only which are stress governed and where yield strength is the main design criteria.
Abstract: In the past Boiler Structure has been designed using mainly carbon steel plates of Grade E250 or E350. This paper presents and analyses the application of High Tensile steel (E550 Grade as per IS: 2062) in Heavy structure like Boiler Supporting Steel Structure. Boiler supporting Structure consists of major weight contribution in Columns and Beams w...
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