Results 11 to 20 of about 17,058 (192)

The Poisson CUSUM Chart for Monitoring Small Counts: Addressing the Estimation Uncertainty. [PDF]

Biom J
ABSTRACT This study addresses the impact of estimating in‐control parameters on the performance of the Poisson cumulative sum (CUSUM) chart in detecting an increase in the mean when the counts are small. To reduce false signals induced by estimation uncertainty, recommendations prescribe impractically large sample sizes or propose methods that widen ...
Heidema S, Stoepker IV, Huits R, Heuvel ERVD.   +3 more
europepmc   +2 more sources

Long-term stability analysis of beam shape in a robotic radiosurgery system. [PDF]

J Appl Clin Med Phys
Abstract Purpose This study aimed to investigate the long‐term stability of CyberKnife beam profile parameters and assess their compliance with existing quality assurance (QA) guidelines. We evaluated beam profiles in both standard and diagonal planes over 3.5 years post‐installation to detect potential issues and ensure consistent beam quality.
Hinoto R, Kashiyama S, Eriguchi T, Tsukamoto N, Sakae T.   +4 more
europepmc   +2 more sources

Prediction Intervals for Overdispersed Poisson Data and Their Application in Medical and Pre-Clinical Quality Control. [PDF]

Pharm Stat
ABSTRACT In pre‐clinical and medical quality control, it is of interest to assess the stability of the process under monitoring or to validate a current observation using historical control data. Classically, this is done by the application of historical control limits (HCL) graphically displayed in control charts. In many applications, HCL are applied
Menssen M, Dammann M, Fneish F, Ellenberger D, Schaarschmidt F.   +4 more
europepmc   +2 more sources

Estimation of production consistency of diphtheria, tetanus, and pertussis components of the DTP vaccine using Shewhart charts

Биопрепараты: Профилактика, диагностика, лечение, 2021
The Russian Federation puts special emphasis on vaccination-related issues, in accordance with the WHO recommendations. The fact that vaccination, in particular with the diphtheria, tetanus, and pertussis vaccine (DTP vaccine), covers large population ...
I. A. Alekseeva, O. V. Perelygina, E. D. Kolyshkina   +2 more
doaj   +1 more source

Assessing the use of the moving window approaches when monitoring social networks using a degree corrected stochastic block model [PDF]

Review of Economics and Political Science, 2021
Purpose – This study aims to assess the effect of updating the Phase I data – to enhance the parameters' estimates – on the control charts' detection power designed to monitor social networks. Design/methodology/approach – A dynamic version of the degree
Abeer A. Zaki, Nesma A. Saleh, Mahmoud A. Mahmoud   +2 more
doaj   +1 more source

Control charts for monitoring drip irrigation with different hydraulic heads

Revista Ambiente & Água, 2020
This study monitored a drip irrigation system with different hydraulic heads, using control charts. The study included 25 tests, and was conducted at the Experimental Nucleus of Agricultural Engineering of the State University of Western Paraná, located ...
Allan Remor Lopes, Marcio Antonio Vilas Boas, Felix Augusto Pazuch, Diane Aparecida Ostroski, Marta Juliana Schmatz   +4 more
doaj   +1 more source

The development of egg hatching and storage machines equipped with cooling and heating systems and iot [PDF]

, 2021
The development of egg hatching and storage machines equipped with cooling and heating systems and IoT was for helping chicken breeders to address the issue of chicken production shortages. To produce large numbers of poultry production, eggs hatching is
Abdulrahman, Khairul Anuar, Baharudin, Nurhayati, Hussin, Muhammad Nur Aizat, Rahim, Mohd Bekri, Razali, Nizamuddin, Rozali, Mohd. Zulfadli, Yunus, Faizal Amin Nur   +6 more
core   +1 more source

Using Shewhart charts to monitor quality characteristics of preventive vaccines for tuberculosis

Биопрепараты: Профилактика, диагностика, лечение, 2023
Scientific relevance. The quality of medicinal products, particularly vaccines, is contingent on the stability of the manufacturing process at all stages, which can be evaluated using Shewhart charts for data obtained by monitoring the quality attributes
A. A. Savina, N. V. Aleksandrova, T. I. Nemirovskaya   +2 more
doaj   +1 more source

Statistical Process Control as a Failure Removal Improvement Tool

Acta Technologica Agriculturae, 2018
Continuous improvement should be a part of the strategy of every modern company that wishes to meet the requirements posed by the demanding, competitive market.
Zasadzień Michał, Midor Katarzyna
doaj   +1 more source

Optimized repetitive sampling X-bar control chart: performance evaluation and comparison with Shewhart control chart

Frontiers in Applied Mathematics and Statistics, 2023
When initial sample information falls short of enabling industrial engineers to confidently make decisions about lot quality assessment, repetitive sampling emerges as a solution.
Jose J. Muñoz, Muhammad Aslam, Manuel J. Campuzano   +2 more
doaj   +1 more source