Anuj Bhatnagar

A 5S red tag is a tool used in the 5S method of workplace organization and management. It is a systematic approach to organize and maintain a clean and efficient work environment.
 
The five "S"s stand for Sort, Straighten, Shine, Standardize, and Sustain.
 
The red tag is used to identify items that are not needed or are in the wrong place, and it serves as a visual cue that they should be removed or relocated. These items are tagged with a red label or tag and then removed or relocated to a designated area. The red tag is used as a visual prompt to identify items that are not needed in the work area, which helps to reduce clutter and improve efficiency, which are key components of continuous improvement. This also helps to keep the work area clean and organized, which improves productivity, safety, and quality.
 
Additionally, the red tag serves as a visual cue to think about the purpose of the item and check whether it is needed or not. This questioning process is a way of continuous improvement, by encouraging to think critically about the workplace and identify ways to improve it.
 
A red tag is used to identify items that are not needed or are in excess in a work area. The criteria for removing a red tag from an item are as follows:
The item is needed for the work process and is being used regularly. The item has been repaired or reorganized and is now in good working condition. The item is being used as a spare or for backup purposes. The item is being used for training or demonstration purposes. The item is being held for a specific project or future use. The item has been assigned to another area or department where it is needed.  
It is important to note that the decision to remove a red tag from an item should be made by a designated team or individual and should be based on clear criteria and documented in a log or database.

GRR i.e., Gage repeatability & reproducibility is a Measurement System Analysis (MSA) method to evaluate a gauging instrument’s accuracy (and consistency) by validating its measurements repeatability & reproducibility.
Repeatability is the measure of variation obtained when same measuring instrument is used several times by same operator to measure identical characteristics of same part.
Reproducibility is the measure of variation obtained when different operators use the same measuring instrument several times to measure identical characteristics of same part.
A series of measurements are taken using same instrument by same as well different operators (also called appraisers). However, parts which are subject to measurements can be same or different based on the design depending upon the nature of testing, non-destructive or destructive.
There are primarily two types of designs in GRR –
Crossed designs: In this design each part can be measured repeatedly i.e., each operator inspects the same part.

Nested designs: This design is used when same part cannot be tested for repeated measurements as the part gets destroyed in testing. Thus, the operators are given different parts from the same batch.

 
Here are some examples:
Crossed designs (parts are not destroyed in testing, hence same part can be tested by different operators) –
·        Measuring weight of drug in Pharma industry
·        Measuring the dimensions of parts of a vehicle or fuel efficiency of the vehicle in Automobile industry
·        Measuring dimensions, shape, and/or size etc. of parts like sheet metals in Engineering industry
Nested designs (parts are destroyed in testing, hence same part cannot be tested by different operators) –
·        Measuring the effect/ chemical properties of a drug by dissolving it in a chemical in Pharma industry
·        Crash test for vehicles in Automobile industry
·        Measuring the ductility, malleability and/or chemical properties of parts like sheet metals in Engineering industry