After the business requirements are identified and the fit-gap analysis is done, one crucial decision the project team has to make is whether to build the required customizations or buy an existing solution to bridge the solution gap. During the fit-gap analysis, you can use the LCS Business Process Modeler (BPM) libraries and add the requirements associated with the business process. You can specify whether the element is a fit or gap, and you can determine a high-level estimation. You can then use the LCS BPM library to view all of the processes and gaps to identify the areas that require ISV solutions.   

There are a great many ISV solutions available in the Dynamics 365 ecosystem that can help you to bridge the gap between the standard product and the required industry-specific functionality. Usually, if someone already has a solution that has been used by multiple customers, it will be less risky than developing your solution—you don't want to reinvent the wheel.

Solution architects and the technical and functional teams need to act like the customer's advocate in choosing ISV solutions. Getting the right ISV solution is essential for your success.

Microsoft AppSource has made it super easy to find the right ISV solution. As shown in the following screenshot, visit https://appsource.microsoft.com, refine your search by category, industry, and product, and you'll get a list of ISV solutions available as per your criteria:

Using the search result, you can contact the provider directly through the portal. Some ISV providers allow you to sign up for the trial version of their solution right from the portal. AppSource indeed makes it easy to search the ISV solutions; however, it is not that easy to decide on one. Let's dig further to understand essential considerations before choosing an ISV solution.