Research And Development Intensity Tier Type Dimension This dimension categorises the reported data relating to the research and development intensity tiers. Tier 1 Details related to tier 1 of research and development intensity. Tier 2 Details related to tier 2 of research and development intensity. Tier 3 Details related to tier 3 of research and development intensity. Tier 4 Details related to tier 4 of research and development intensity. Non Tier Details related to non tiered research and development intensity.