Guide for Measurement Systems Analysis (MSA)

2017 ◽  
Author(s):  
Keyword(s):  
Systems Analysis ◽  
Measurement Systems ◽  
Measurement Systems Analysis

A Measurement Systems Analysis of Total Shutter Open Time (TSOT) as a Distraction Metric for Visual-Manual Tasks

2007 ◽  
Vol 51 (24) ◽  
pp. 1545-1549
Author(s):  
Louis Tijerina ◽  
Dev Kochhar
Keyword(s):  
Systems Analysis ◽  
General Procedure ◽  
Task Completion ◽  
Measurement Systems ◽  
The Road ◽  
Open Time ◽  
Driver Workload ◽  
Measurement Systems Analysis ◽  
Using Data ◽  
Manual Tasks

The Total Shutter Open Time (TSOT) metric was examined for estimating the visual-manual distraction potential of in-vehicle devices. A measurement systems analysis was carried out on TSOT using data on thirteen visual-manual tasks from the CAMP Driver Workload Metrics Project. TSOT showed low test-retest reliability but high repeatability when data were averaged across persons by task. TSOT predicted task completion time, lane keeping, speed variation, total glance time, and number of glances away from the road while driving. Tasks were classified into higher and lower workload categories based on literature, analytical modeling, and engineering judgment. TSOT showed a high percentage of statistically significant pairwise differences between higher vs. lower workload tasks. Different classification rules were also applied to TSOT. The best rule to classify tasks as higher or lower workload consistent with prior prediction was one in which a mean TSOT > 7.5 seconds implied the task was of higher workload. These results illustrate a general procedure to assess driver workload measures in general and the usefulness of TSOT in particular.

scholarly journals Measurement systems analysis automation

2016 ◽  
Vol 0 (31) ◽  
pp. 87-94
Author(s):  
Олег Васильович Козир ◽  
Юліан Михайлович Туз
Keyword(s):  
Systems Analysis ◽  
Measurement Systems ◽  
Measurement Systems Analysis

scholarly journals The Influence of the Load on the Hardness

2011 ◽  
Vol 18 (2) ◽  
pp. 223-234 ◽  
Author(s):  
Jozef Petrík ◽  
Pavol Palfy
Keyword(s):  
Systems Analysis ◽  
Applied Load ◽  
Indentation Size Effect ◽  
Reverse Indentation Size Effect ◽  
Z Score ◽  
Micro Hardness ◽  
Indentation Size ◽  
Measurement Systems ◽  
Measurement Systems Analysis ◽  
The Relationship

The Influence of the Load on the HardnessThe objective of the submitted paper is to analyze the influence of the load on the calibration of micro-hardness and hardness testers. The results were validated by Measurement Systems Analysis (MSA), Analysis of Variance (ANOVA) and Z-score. The relationship between the load and micro-hardness in calibration of micro-hardness testers cannot be explained by Kick's Law (Meyer's index "n" is different from 2). The conditions of Kick's Law are satisfied at macro-hardness calibration, the values of "n" are close to 2, regardless of the applied load. The apparent micro-hardness increases with the increase of the load up to 30 g; the reverse indentation size effect (ISE) behavior is typical for this interval of the loads. The influence of the load on the measured micro-hardness is statistically significant for majority of calibrations.

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