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Jyutping jat1 baan2 jat1 ngaan5
Pinyin yī bǎn yī yǎn

Definitions (CC-CEDICT)
  1. lit. one strong beat and one weak beats in a measure of music (two beats in the bar) (idiom); fig. follow a prescribed pattern to the letter
  2. scrupulous attention to detail
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    following a prescribed pattern in speech or action; scrupulous and methodical
Examples (粵典–words.hk)
  1. Cantonese
    一板一眼
    一板一眼
    jat1 baan2 jat1 ngaan5
    • follow the script beat by beat, rhythm by rhythm
  2. Cantonese
    「𠮶个人乜都一板一眼,好似系强迫症!」「可能只系强迫型性格啫。」
    「嗰個人乜都一板一眼,好似係強迫症!」「可能只係強迫型性格啫。」
    go2 go3 jan4 mat1 dou1 jat1 baan2 jat1 ngaan5, hou2 ci5 hai6 koeng4 bik1 zing3! ho2 nang4 zi2 hai6 koeng4 bik1 zing3 sing3 gaak3 ze1.
    • "That guy does everything with a routine. He is probably with OCD!" "Maybe he is just with a obsessive compulsive personality."