試し作さく段だん階かい

noun

trial stage; experimental phase; prototype stage

Refers to a phase in development where a product, system, or plan is being tested or prototyped before finalization.

• この装そう置ちはまだ試し作さく段だん階かいで、量りょう産さんは来らい年ねんからです。

  This device is still in the prototype stage; mass production will start next year.

• 試し作さく段だん階かいのソフトウェアにはバグがつきものです。

  Bugs are inevitable in software at the experimental phase.