Complex sentence: Congreve was a man of immense drive and vision, a pioneer of careful management, quality control and scientific method and under his regime manufacture moved from what had been a black art to, in the context of its day, an advanced technology.
Split into simpler sentences: Congreve was a man of immense drive and vision, a pioneer of careful management, quality control and the application of the scientific method. Under his regime manufacture moved from what had been a black art to, in the context of its day, an advanced technology.