scholarly journals Indicators of reproducibility and suitability for assessing the quality of production services

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 54
Author(s):  
Oleksandr Vasilevskyi ◽  
Maryna Koval ◽  
Svetlana Kravets
Keyword(s):  
Standard Deviation ◽  
Production Process ◽  
Tolerance Limits ◽  
Control Card ◽  
Suitability Index ◽  
Tolerance Field

<p>A technique is proposed for estimating the probability of the possible appearance of defective products or the inconsistency of the production service on the basis of indexes of suitability and reproducibility of the production process.</p><p>The index of reproduction is recommended to be calculated on the basis of the standard deviation, which can be established by the average span of the control map and the limits of the tolerance field. At the same time, the production process must necessarily be in a state of statistical controllability. The suitability index cannot be calculated on the basis of the control card characteristics, but it is evaluated solely on the basis of the total of the standard deviation, which is calculated by the Bessel formula and the tolerance limits. The production process does not need to be statistically controllable. Conclusions on the suitability or insufficiency of the products (production services) are based on the value of the indexes of reproduction and suitability, which can take values less than or greater than one. On the basis of these indexes of obtained values, the probability of production appearance or characteristics of the production process, that does not match the established requirements, is established.</p>

scholarly journals Normalization of reproducibility and suitability indexes for assessment of products or production services quality

2020 ◽  
Vol 100 (4) ◽  
pp. 28-38
Author(s):  
J. Stuglik ◽  
◽  
I.P. k Kurytnik ◽  
O.M. Vasilevskyi ◽  
V.Yu. Kucheruk ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Production Process ◽  
Services Quality ◽  
Tolerance Limits ◽  
Control Card ◽  
Suitability Index ◽  
Tolerance Field

A technique is proposed for estimating the probability of the possible appearance of defective products (or the inconsistency of the production service) on the basis of the suitability and reproducibility indexes of the production process. The index of reproduction is recommended to be calculated on the basis of the standard deviation, which can be established by the average span of the control map and the limits of the tolerance field. At the same time, the production process must necessarily be in a state of statistical controllability. The suitability index can not be calculated on the basis of the control card characteristics, but is calculated solely on the basis of the total of the standard deviation, which is calculated on the basis of the Bessel formula and tolerance limits. The production process does not need to be statistically controllable. Conclusions on the suitability or insufficiency of the products (production services) are based on the value of the indexes of reproduction and suitability, which can take values less than or greater than one. On the basis of the obtained values of these indexes, the probability of production appearance or characteristics of the production process, that does not match the established requirements, is established.

Statistical Management of Food Production Processes

2020 ◽  
pp. 30-35
Author(s):  
N.A. Jurk ◽  
Keyword(s):  
Production Process ◽  
Control Chart ◽  
Food Production ◽  
Time Interval ◽  
Bakery Products ◽  
Shewhart Control ◽  
Manufactured Products ◽  
Mnemonic Technique ◽  
The Stability

The article presents scientific research in the field of statistical controllability of the food production process using the example of bakery products for a certain time interval using statistical methods of quality management. During quality control of finished products, defects in bakery products were identified, while the initial data were recorded in the developed form of a checklist for registering defects. It has been established that the most common defect is packaging leakage. For the subsequent statistical assessment of the stability of the production process and further analysis of the causes of the identified defect, a Shewhart control chart (p-card by an alternative feature) was used, which allows you to control the quality of manufactured products by the number of defects detected. Analyzing the control chart, it was concluded that studied process is conditionally stable, and the emerging defects are random. At the last stage of the research, the Ishikawa causal diagram was used, developed using the 6M mnemonic technique, in order to identify the most significant causes that affect the occurrence of the considered defect in bakery products. A more detailed study will allow the enterprise to produce food products that meet the established requirements.

Typical errors and violations of biotechnics of artificial breeding of pacific salmon

2020 ◽  
pp. 13-23
Author(s):  
Ekaterina Grinberg
Keyword(s):  
Production Process ◽  
Preventive Measures ◽  
Pacific Salmon ◽  
Fish Farming ◽  
Important Condition ◽  
The Third ◽  
Fish Breeding ◽  
Artificial Breeding ◽  
Strict Compliance

In two parts of the article, more than 70 errors and violations of the Biotechnics of artificial breeding of Pacific salmon in salmon hatcheries are collected and summarized, which lead to an immediate or delayed deterioration of the quality of reared fry and a decrease in their survival rate. Deviations from the biological basis of fish farming are shown and possible consequences of such errors or violations are predicted. In the first part of the article (#7,2020) there were General errors (throughout the entire fish-breeding process), as well as violations of Biotechnics during the work with producers, collecting eggs and preparing them for incubation, in the second part-violations of Biotechnics during the incubation of eggs, holding pre-larvae, rearing and release of young. Their correction, prevention or minimization of consequences will significantly improve the quality of sexual products and offspring from producers, increase the linear and weight gain of juveniles during rearing, improve the coefficient of feed payment, reduce the time of rearing, improve the epizootic situation by developing immunity in fry and mobilizing other protective reactions of their body, significantly reduce waste at all stages of the production process, increasing survival by 10–15%. In conclusion, it is noted that the first and most important condition for an efficient salmon hatchery is the creation of optimal environmental conditions at each stage of the production process. The second condition is strict compliance with the Biotechnics of artificial salmon breeding and the complex of veterinary and sanitary, fish-breeding and meliorative and therapeutic and preventive measures. The third is the availability of competent specialists who regularly improve their skills in accredited Universities to implement, control and manage the first two conditions.

scholarly journals Disentangling Individual Phases in the Hunted vs. Farmed Meat Supply Chain: Exploring Hunters’ Perceptions in Italy

Foods ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 174
Author(s):  
Maria Elena Marescotti ◽  
Eugenio Demartini ◽  
Michael Gibbert ◽  
Roberto Viganò ◽  
Anna Gaviglio
Keyword(s):  
Supply Chain ◽  
Production Process ◽  
Emerging Market ◽  
Final Phase ◽  
Game Meat ◽  
Wild Game ◽  
Wild Boar Meat ◽  
Training Activities ◽  
Final Consumer

The growing body of literature concerning the hunted wild game meat (HWGM) supply chain is mainly focused on the final consumer, while little is known about upstream production processes. Even though the hunter plays a central role here, it is not well understood how hunters themselves perceive their role in the various phases of the production process. The present study explores Italian hunters’ perception of the HWGM supply chain and compares it to their perception towards the conventional farmed meat supply chain. We distinguish several phases of this production process and find that the final phase related to on-site game dressing is considered problematic, perhaps because hunters perceive themselves as less skilled than professional butchers. The results, in fact, show that hunters prefer hunted products over farmed meat, but that they consider hunted wild boar meat less safe compared to farmed pork. Findings from this study provide a rare glimpse from the inside of the supply chain and reveals the needs for a broad risk assessment analysis on the Italian game meat supply chain. Considering the development of the Italian emerging market of the HWGM, our results also highlight the relevance of training activities on hunters in order to increase the safety and quality of the final product.

scholarly journals σ2 R , a reciprocal-space measure of the quality of macromolecular electron-density maps

1999 ◽  
Vol 55 (6) ◽  
pp. 1174-1178 ◽  
Author(s):  
Thomas C. Terwilliger
Keyword(s):  
Standard Deviation ◽  
Ab Initio ◽  
Electron Density ◽  
Reciprocal Space ◽  
Rapid Evaluation ◽  
Reliable Measure ◽  
Similar Measure ◽  
Acta Cryst ◽  
Density Maps

It has previously been shown that the presence of distinct regions of solvent and protein in macromolecular crystals leads to a high value of the standard deviation of local r.m.s. electron density and that this can in turn be used as a reliable measure of the quality of macromolecular electron-density maps [Terwilliger & Berendzen (1999a). Acta Cryst. D55, 501–505]. Here, it is demonstrated that a similar measure, \sigma_{R}^{2}, the variance of the local roughness of the electron density, can be calculated in reciprocal space. The formulation is suitable for rapid evaluation of macromolecular crystallographic phases, for phase improvement and for ab initio phasing procedures.

scholarly journals Circadian variation of fatigue in both patients with paralytic poliomyelitis and post-polio syndrome

2013 ◽  
Vol 71 (7) ◽  
pp. 442-445 ◽  
Author(s):  
Celiana Figueiredo Viana ◽  
Márcia Pradella-Hallinan ◽  
Abrahão Augusto Juviniano Quadros ◽  
Luis Fabiano Marin ◽  
Acary Souza Bulle Oliveira
Keyword(s):  
Standard Deviation ◽  
Sleep Disturbances ◽  
Circadian Variation ◽  
Progressive Increase ◽  
Paralytic Poliomyelitis ◽  
Poor Sleep ◽  
Poor Sleep Quality ◽  
Significant Difference ◽  
Sleep Parameters

ObjectiveIt was to evaluate the degree of fatigue in patients with paralytic poliomyelitis (PP) and with post-polio syndrome (PPS), and correlate it with parameters of sleep and the circadian cycle.MethodsThirty patients, 17 female (56.7%), participated in the study: they answered the Revised Piper Fatigue Scale and performed a nocturnal polysomnographic study. Eleven had PP (mean age±standard deviation of 47.9±6.4 years), and 19 had PPS (mean age±standard deviation of 46.4±5.6 years).ResultsOur study showed that fatigue was worse in the afternoon in the PP Group and had a progressive increase throughout the day in the PPS Group. We also observed compromised quality of sleep in both groups, but no statically significant difference was found in the sleep parameters measured by polysomnography.ConclusionFatigue has a well-defined circadian variation, especially in PPS Group. Poor sleep quality is associated with fatigue and, therefore, sleep disturbances should be evaluated and treated in this group of PPS.

scholarly journals Quality of Water Production Process Using Mixed Multivariate EWMA-CUSUM (MEC) Control Chart

2021 ◽  
Vol 1863 (1) ◽  
pp. 012037
Author(s):  
N H D Asmara ◽  
Wibawati ◽  
M Ahsan ◽  
M Mashuri ◽  
H Khusna
Keyword(s):  
Production Process ◽  
Control Chart ◽  
Water Production ◽  
Quality Of Water

scholarly journals ESTIMATION OF STRUCTURAL SIMILARITY FOR CONTROL OF MICROELECTRONIC PRODUCTS

2019 ◽  
Vol 1 (7) ◽  
pp. 14-18
Author(s):  
Yu. A. Gusman ◽  
Yu. A. Pichugin ◽  
A. O. Smirnov
Keyword(s):  
Production Process ◽  
Technological Process ◽  
Good Reason ◽  
Structural Similarity ◽  
Fixed Number ◽  
Crystal Plate ◽  
Technological Scheme ◽  
Real Sample ◽  
Numerical Example

In this paper we consider the technological process of manufacturing micromechanical gyroscopes, the output of which is divided into cells of the crystal plate and each cell contains a fixed number of product elements. The estimation of structural similarity for measurements of technical characteristics of various devices is offered. A relatively large value of structural similarity assessment means that there is a dependence of the quality of the manufactured devices on the position on the crystal plate. This gives a good reason for further work to improve the quality of the process or to change the technological scheme as a whole. The article considers a numerical example based on a real sample of microelectronic products. The proposed method can be used both in the process of adjustment of the production process and in the rejection of products, when further configuration of the equipment is no longer possible.

scholarly journals Batik stamp canting made of waste paper material as a frugal innovation in batik

2021 ◽  
Vol 905 (1) ◽  
pp. 012125
Author(s):  
S R Hidayat ◽  
T B Affanti ◽  
A I Josef ◽  
D Nurcahyanti
Keyword(s):  
Production Process ◽  
Case Studies ◽  
Qualitative Approach ◽  
Data Sources ◽  
Waste Paper ◽  
High Price ◽  
Frugal Innovation ◽  
Value Of Knowledge

Abstract This article discusses the innovation of batik stamp canting equipment using waste paper material. The first focus is on the emergence and the background of the innovation of batik stamp canting made of waste paper material. The second is on the elaboration of concept of stamp batik canting innovation made of waste paper material. The method applied in this study was qualitative approach with case studies by employing informants’ data sources, artifacts, events and documents. The results indicate that the innovation of stamp canting using paper material has occurred since 2014, and it began to be widely used in batik production process in 2016. The background of stamp canting innovation made of waste paper was triggered by the high price of stamp canting from copper which is commonly used in the production process of stamped batik. The concept applied to develop this stamp canting is frugal innovation. The value of knowledge gained is that innovation is not always carried out to improve the quality of processes or products. Innovation is more significantly needed to solve the problems related to the context.

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