The updating provided by a newly constructed invocation matrix in response to the changes described can be used to update the network matrix constructed by matrix summation of multiple invocation matrices. The network matrix is revised by summing invocation matrices, one or more of which is newly revised in response to one or more changes in the interfaces between one or more pairs of microservices. Matrix subtraction of the prior network matrix from the revised network matrix can identify the effects of the changes on the network of microservices.