A network structure that works well for voice telephone traffic may prove horribly inefficient at carrying data.

Full employment was realised but the town's industry proved inefficient.

This may sometimes prove inefficient, seen from the perspective of crude performance indicators.

The Congress tried to handle administrative affairs through legislative committees, which proved inefficient.

For generations the industry had followed a patchwork growth pattern that proved inefficient in the face of world competition.

But he said the cut was justified because the screening process had proved inefficient and ineffective.

The steam passenger cars were available, but the route was roundabout and proved inefficient.

Tuppence had therefore very little fear of proving inefficient.

And politicians fear a big Government jobs program will prove costly and inefficient.

The industry then brought suits against individuals who shared copyrighted material over the Internet, but that proved inefficient.