Wyniki wyszukiwania - BazTech

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Ocena ryzyka ergonomicznego z zastosowaniem komputerowego modelowania i symulacji - studium przypadku

Lasota Andrzej Marek

Zarządzanie Przedsiębiorstwem

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2023

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Vol. 26, nr 2

22--26

EN

In manufacturing environments, health and safety in the workplace is very important for all employees to work efficiently and productively. Ergonomic risk factors can have a negative impact on workers when performing their tasks at work. And generate costs for enterprises due to sickness absence, reduced quality. Therefore, ergonomic assessments of workstations should be widely used. The paper presents an ergonomic risk assessment using computer modeling and simulation based on a palletizing station as a case study. The palletizing station was modeled in a virtual environment using DHM Process Simulate Human. The DHM was used to perform an ergonomic assessment of the worker’s posture using the RULA method. The Picking activity was qualified to action category 3, while Placing on a pallet - to the fourth action category. The Ishikawa diagram was used to diagnose the causes of ergonomic risk to musculoskeletal disorders, which allowed for the formulation of recommendations. Recommendations relating to changes in the layout of the workplace were applied in DHM. The ergonomic assessment of the operator working postures after the ergonomic intervention showed an ergonomic risk reduction. The Picking and Placing on the pallet activities were classified to action category 2.

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Implementation of Fishbone Diagram by cause & effect analysis for construction projects

Kaya Burak Ozan

Archiwum Wiedzy Inżynierskiej

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2023

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T. 8, Nr 1

6--8

EN

This study aims to practice the implementation of the Fishbone Diagram for Cause & Effect Analysis and prove the validity of the technique’s usability in any construction project to increase productivity for both construction managers and engineers. In every sub-branch of the given Fishbone Diagram, possible failures might be expected to occur unless necessary precautions are taken. The failures, emerge as significant problems and range from possible delays to product quality deficiencies which would affect the acceptance of the project from customers. During the creation of the Fishbone Diagram, the obtained results show us that possible delays are co-existing among each of the 5 M's. Fishbone Diagram in the study also points out there are common issues and similarities between Men and Machine since both 2 M’s lead to progress in a construction project and are interdependent. As a result of this study, usage of Fishbone Diagram Technique demonstrated the possible connections between M’s and determination of the Cause & Effect relations in a construction project. Findings of this study proved that usage of Cause & Effect Analysis in construction projects is also practical to determine the key points of a construction and interdependent factors.

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Analysis on the influence factor of low-strength wet shotcrete in frigid mining area

Sun Wei, Shengyou Zhang, Feng Xinglong, Hou Kepeng

Archives of Mining Sciences

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2020

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Vol. 65, no. 2

285--298

EN

Wet shotcrete technology is being gradually used in roadway support in frigid mining areas. Thus, problems such as low strength, fragility, and high repair rate have also emerged. This study focuses on low strength, cracking, and other problems in the wet shotcrete support of a mine. It introduced the fishbone diagram to investigate the effects of temperature, cement content, and water-cement ratio (W/C) on the strength of the shotcrete layer. The microscopic morphology of wet shotcrete based on scanning electron microscopy (SEM) is observed. Results demonstrated that temperature was the main influencing factor of wet shotcrete in frigid mining areas. When the curing temperature was lower than 10°C, the early strength of wet shotcrete dropped significantly. Temperatures above 15°C were favorable for later gain in strength. W/C was of a complementary relationship with strength development at different ages. Temperature was the essential factor that influenced the microscopic morphology of wet shotcrete. Furthermore, internal initial porosity and aggregate interface bonding strength had a direct effect on macro-mechanical properties of wet shotcrete.

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Elementy ryzyka w zarządzaniu jakością w przedsiębiorstwie produkcyjnym

Kozakiewicz M., Sawicki G.

Mechanik

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2017

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R. 90, nr 7

624--626

PL

Omówiono wybrane aspekty ryzyka w systemie zarządzania jakością. Zaprezentowano przykładowy model procesu produkcyjnego. Opracowano diagram przyczynowo-skutkowy dla niepełnowartościowego wyrobu. Wskazano możliwe podejście do planowania działań odnoszących się do ryzyk i szans w systemie zarządzania jakością.

EN

Discussed are chosen risk aspects in a quality management system. Presented is a model of production process. The Fishbone Diagram was developed. Possible approach to planning actions to address risks and opportunities indicated.