Slimming down/streamlining: reducing excess parts or costs to make something smaller or more efficient. Used in business/manufacturing (e.g., streamlining an organization or reducing product weight). Often used as 'スリム化する'.
会社は業績悪化に対応して組織のスリム化を進めると発表した。
The company announced it will proceed with organizational streamlining in response to poor performance.
製品のスリム化により、材料費を削減できた。
By slimming down the product, they were able to reduce material costs.
プロジェクトの無駄を省いて全体をスリム化する必要がある。
It's necessary to eliminate waste in the project and streamline the whole operation.