The mirror behind the dial-pointer of a measuring instrument is used to reduce parallax error.
Parallax error occurs when the observer's line of sight is not directly perpendicular to the scale or pointer being observed. This misalignment can lead to inaccurate readings. By placing a mirror behind the dial-pointer, the reflection of the pointer is superimposed with the actual pointer image. This allows the observer to align their line of sight with the reflected image and eliminate the parallax error.
The basic reason for randomness in sampling is to eliminate personal bias.
Random sampling is a method of selecting individuals or items from a population in a way that every member of the population has an equal chance of being included in the sample. By using random sampling, researchers can minimize personal bias and ensure that the sample is representative of the larger population.
ANOVA stands for "Analysis of Variance." It is a statistical technique used to analyze and compare the means of two or more groups or populations to determine if there are any statistically significant differences between them. ANOVA is particularly useful when comparing means across multiple groups or factors to understand if the observed differences are due to random variation or if they can be attributed to a specific factor or treatment.
SIPOC stands for Supplier, Input, Process, Output, Customer. It is a visual tool used in process improvement and Six Sigma methodologies to map out the high-level view of a process.
QMS stands for "Quality Management System." A Quality Management System refers to a set of processes, policies, procedures, and resources that an organization implements to ensure that its products or services consistently meet or exceed customer requirements and expectations.
A "Go/No-Go Gauge" is a measuring tool that does not return a size in the conventional sense, but instead indicates the acceptability or unacceptability of a part or component. It is also known as a "pass/fail gauge" or a "limit gauge." The Go/No-Go gauge consists of two ends: a "Go" end and a "No-Go" end. The "Go" end has dimensions that represent the maximum allowable size or dimensions for the part, indicating that the part is within the acceptable range. The "No-Go" end has dimensions that represent the minimum allowable size or dimensions, indicating that the part is outside the acceptable range and considered unacceptable. By testing the part against the Go/No-Go gauge, the inspector can quickly determine whether the part meets the required specifications or not.
The lowest design resolution in which main effects are not confounded with any other main effect is called a "Resolution III design."
In experimental design, resolution refers to the ability to estimate and distinguish between different effects or factors in the experiment. A Resolution III design ensures that each main effect is uniquely estimable and is not confounded with any other main effect. This means that the effects of each individual factor can be determined without interference from interactions with other factors.
