However, innovations rely on access to a skilled and well-educated labour force, i.e. the skill formation process is of particular importance. In addition, specific elements such as infrastructure, the investment or business climate are essential factors for increasing the supply capacity of manufacturing. Without a reliable set of conditions (for instance, access to basic infrastructure), the development of capacities is limited. These issues were frequently raised by partner and donor countries in the OECD-WTO Aid for Trade Global Review Monitoring Exercise (2019) when asked about constraints to economic diversification and successful industrialisation.