Его предложение о том, чтобы внести

Его предложение о том, чтобы внести изменения в организацию производства, было хорошо обосновано фактами.

Результаты (английский) 1:

His proposal to make changes in the Organization of production, was well justified by the facts.

Результаты (английский) 2:

His suggestion to make changes in the organization of production, it is well justified by the facts.

Результаты (английский) 3:

His proposal was that, in order to make changes in the organization of production, was well-founded on facts.