Document, share and reuse common solution building blocks
To provide better services to citizens, businesses and other administrations, public administrations are continuously increasing the scope and volume of information exchange with each other, across both borders and sectors. To facilitate these exchanges, the need for common solution building blocks in Europe is more pressing than ever.
Using common terminology to design, assess and find common IT solution building blocks increases interoperability and decreases the development cost of often very complex IT systems.
6.1. Document key solution building blocks using a common reference architecture
To carry out day-to-day operations, public administrations require complex and large-scale IT solutions. However, these solutions are often developed in their specific contexts and their functionalities are neither documented nor categorised in a common way. Due to this lack of clarity about the available IT components, it is difficult to organise effective IT governance. Frequently, this results in redundant expenditure and competing solutions giving rise to a costly and fragmented IT landscape
The European Interoperability Reference Architecture (EIRA) defines the most important architecture building blocks needed to develop, assess and communicate about interoperable solutions for digital public services. 
To address this issue, public administrations should map key solution building blocks to a common reference architecture, in accordance with a common vocabulary, terminology and structure. This way, it is known which building blocks serve which user needs and also if there are needs not supported by any building block.
6.2. Check the reusability of existing solutions before developing a new one
Before commissioning or developing new IT solutions, public administrations should check whether similar solutions already exist and can be reused. Such a ‘digital check’ should also be performed at the highest possible level, i.e. as part of an IT impact assessment for new legislation. In this way, public administrations will ensure that the reuse of common IT solutions is taken into account early in the policymaking lifecycle.
The European Commission has included the notion of the ‘digital check’ in a Toolbox (tool No. 23 on ‘ICT assessment, the digital economy and society’) that supports the Impact Assessment process of new or revised EU legislation. 
Carrying out such a reusability check should be a prerequisite for any organisation asking for funding. This would provide clear evidence that the solution to be developed does not exist yet or that it can benefit from existing solutions or building blocks, ensuring that public resources are used efficiently.
Administrations should carry out reusability checks by consulting common registries of reusable IT solutions.
|Recommended measures for central bodies|