I think one implementation if this is where Japanese rail workers point and call out the thing they are noting, checking, or changing as a form of conscious attention.
That's more of a learned behavior that helps you consciously check everything; it's almost the opposite of pokayoke. Implementing pokayoke would involve locking out (or making it incredibly hard) for rail workers to continue a process without confirming that everything has been done as intended.
Maybe. I think it wouldn't qualify for a few reasons. I'm sure others would be able to justify this as being a form of error proofing.
1. From Toyota Production System An Integrated Approach to Just-In-Time by Yasuhiro Monden, "A mistake-proofing system consists of a detecting instrument, a restricting tool, and a signaling device. The detecting instrument senses abnormalities or deviations in the workpiece or the process, the restricting tool stops the line, and the signaling device sounds a buzzer or lights a lamp to attract the worker's attention." I don't think pointing and calling works for this since there is a human in the loop that would have to detect, for example, the speed is too fast for the segment of track, restrict the speed by slowing the train down, and call attention to another operator to help. The goal is to eliminate the human from this process to ideally free them up to do work that respects their humanity [1].
2. Pointing and calling is only 85% effective as called out on the Wikipedia page for it. The benefit of mistake proofing is 100% built-in quality control according to the Wikipedia page.
3. From practical experience in automotive part manufacturing, our customers did not accept human based interventions or process changes as a form of error proofing. The error proofing needs to be built into the process and it can't be something that an operator can by pass. Pointing and signalling can be bypassed if the employee chooses not to do it. I'm sure there is ways of bypassing some error proofing systems, but that's what the customer wants.
Error proofing is part of a system called autonomation []. One of the goals is to be able to have multi-skilled workers be able to work within a cell. Basically the human operator takes on a loading and unloading focus in the manufacturing process. Several operations would be performed in sequence. The operator would put the raw material in at one side of a machine cell, transfer it to the subsequent operations until the last operation has been completed. The goal is for the piece to be produced with minimal waiting time between each successive operation and for the machines to be able to detect if a defect has been produced.
“Pointing and Calling” (Shisa Kanko):
https://www.atlasobscura.com/articles/pointing-and-calling-j...
https://www.christopherroosen.com/blog/2020/4/20/how-the-rit...