Table 3 Time requirements in the domain of industry.

Mining (silicates, metallic ores, …)

n^{0.6 ±0.15}

Metal production

n^{0.6 ±0.15}

Production of metallic objects

n^{0.6 ±0.15}

Ceramics and glass production

n^{0.6 ±0.15}

Chemical industry

n^{0.6 ±0.2}

Production of clothes

n^{0.6 ±0.2}

Other activities, including innovation

n^{0.6 ±0.2}