As a result a keyword search of project descriptions has been used. The limitation of this approach is the lack of consistency and gaps in reporting on the project descriptions in the CRS, which means some activities that engage the private sector may not be identified using a word search and are therefore not included in the analysis. Work is under way to improve the way private sector instruments are categorised and tracked within the system, so tracking such efforts in the future will be easier. As a result the analysis of development finance statistics does not align strictly with the description of private sector engagement (PSE) used in Chapter 2, which considers private sector development a subset of PSE.