Katakana sometimes is used to draw attention to words that would be normally written in hiragana or kanji. It can sort of function like italics or bold type tha

Katakana sometimes is used to draw attention to words that would be normally written in hiragana or kanji. It can sort of function like italics or bold type that way. In this case it might be used to signify that it is a specific method rather than just a collection of words. The english equivalent might be capitalizing the letters in Six Sigma to refer to a specific industrial quality process rather than the math term.