uid Logic (used in one LA) and Mosaic (used in three LAs). It is worth noting that although three of the LAs use the same system, each has set it up differently and, therefore, there is variation in the way each of them uses the system. D2I produced a data matrix (appendix one) that details every data item on every form provided by the four participating LAs which they use in relation to their work with CLA. The data matrix had three intended outcomes: 1. To identify and group data items which gather the same information for the same purpose but may be named differently across the four LAs 2. To provide a field-level overview of reasons for collecting particular data items 3. To enable field-level comparison of the data items and collection mechanisms across each of the four LAs The data matrix lists 1,575 data items from 44 different forms used by practitioners to collect information about children, young people, and their families. Each LA operates differently and has a different workflow for their CLA forms, which means that the forms do not align across the four participating LAs. Considering the extent of variation between LAs’ forms, it was not possible to create the data matrix by matching data items form to form. Matching form to form would have been possible if only key forms, such as pathway plans, CLA reviews, and care plans, had been used. Instead, the data matrix was created by mapping together the data items contained within the forms, which were then put into categories with similar items placed in the same category. For further details on the data matrix, how it was created and how it has been structured, please see appendix one. Phase 2: Understanding children’s social care workers’ experiences of using case management systems Phase two of the research 