The inability to meet international quality standards has been identified as one of the main constraints to economic diversification by countries, donors and South-South partners in the 2019 aid-for-trade monitoring exercise. A diagnostic tool to identify weaknesses in the quality of infrastructure, such as that developed by UNIDO, could help countries comply with the requirements of the Technical Barriers to Trade (TBT) Agreement and Sanitary and Phytosanitary Measures (SPS) Agreement for trade facilitation (Box 3.2). Building supply capacity, producers can compete with imports and meet a large share of domestic demand. The expansion of the manufacturing sector as well as related agricultural and services sectors contribute to a rise in income, which further increases the volume of demand and creates demand for new and more sophisticated products.