問(もん)題(だい) mondaiは wa計(けい)画(かく) keikakuが gaうまくいく umakuikuかどうか kadoukaだ da。 The problem is whether the plan will work out. Literal Problem [topic-は] plan [subj-が] well-go [whether-かどうか] [copula-だ]. うまくいく ('go well, work out') is an extremely common collocation — うまく (skillfully/well) + いく (go). かどうか ('whether or not') embeds the question as the predicate of 問題は. problem-solving~かどうか (whether or not)
問(もん)題(だい) mondaiは wa計(けい)画(かく) keikakuが gaうまくいく umakuikuかどうか kadoukaだ da。 The problem is whether the plan will work out. Literal Problem [topic-は] plan [subj-が] well-go [whether-かどうか] [copula-だ]. うまくいく ('go well, work out') is an extremely common collocation — うまく (skillfully/well) + いく (go). かどうか ('whether or not') embeds the question as the predicate of 問題は. problem-solving~かどうか (whether or not)