1To knead thoroughly; to work (dough or paste) until smooth and well mixed.
パン生地をしっかり練り上げてから一次発酵に入れる。
Knead the bread dough well before starting the first fermentation.
和菓子は餡を練り上げる工程が重要だ。
For wagashi, the process of thoroughly kneading the bean paste is important.
粘土を丁寧に練り上げてから制作に入る。
Carefully knead the clay before starting the work.
2To polish or refine something (a plan, idea, or work) thoroughly until it is well developed.
企画を何度も見直して練り上げる必要がある。
The plan needs to be reviewed and refined many times.
小説家は登場人物の人物像を練り上げてから執筆を始めた。
The novelist refined the characters' profiles before beginning to write.
プレゼン資料を練り上げる時間が足りなかった。
There wasn't enough time to polish the presentation materials.