The digital function of the organization is attempting to adopt the agile methodology and this is causing an issue with the perceived increased in costs when due diligence is performed on the initial estimates.
For example, the vendor pitched the platform at (let's pick an arbitrary figure), $100. When the technology team was engaged to evaluate its implementation, it was discovered that the deployment would entail hardware, installation, integration support, maintenance, security, etc costs have now blown the initial estimates.
This has resulted management questioning the role the technology team plays since each time a project engages the team, costs increase significantly.
There is clearly a lack of understanding the requirements and generally most of the vendors don't include or account for the additional requirements since it sits outside their remit.
The technology team has invested significant time and effort is describing the increased costs however from a managerial perspective, the issue lies with the operational efficiencies of the team and not the lack of practices in capturing the requirements, understanding scope, the additional costs, etc.
Is there a way to bridge this gap?