This is the BPMN representation of the SIEL model (Loireau et al. (2006)) some interesting error propagation studies betwen categories (e.g. soil), quantitative attribute (e.g. biomass), positions (e.g. vegetaion map) etc ...are currently investigated. These would make such scientific geoworklfow models very useful for decision making.
Can meta-propagation with multivariate uptake using copula distribution be more than a theoretical solution?
I think that would do a very interesting PhD. email me if you are interested!