• Solving Santa’s Sequencing Problem Using Domain Narrowing Constraint Propagation Based on DMN collect hit policies.

    CamundaCon 2019 is just around the corner! Rob Parker, Enterprise Architect at Australia Post, will be presenting Innovative Problems For Elegant Solutions and he’s shared with us a sneak peak at the kind of out-of-the-box thinking his presentation will cover: Everybody is likely familiar with Sudoku puzzles. When I solve them, I typically use little pencil marks to track which values are still feasible in unresolved cells. In other words, for each unresolved cell, I annotate it with the set of remaining possible values or its domain. As each cell is solved, the implication is propagated to its neighboring cells by crossing off the infeasible values (domain narrowing) from each set of candidate values. This technique is effectively a form...

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  • Listen up, keep your privates private!

    In a recent blog post, I described a use case based on facial image recognition to perform an authentication task. In an ideal process, the recognition system either passes or fails the recognition task and the process proceeds via straight through processing to completion. In practice there is a fuzzy boundary between these two outcomes where human judgment via a human task is injected into the process. Now consider the case where say an image of a driver license is used as a reference image. This image contains particularly sensitive information. Hence if a user is required to access this image, have we taken all reasonable steps to protect this information and provide access on a need to know basis?...

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  • Let’s Face it, BPMN and DMN Rock!

    I often describe process based applications as a lot like Lego ®. Functions and services are like the different types and styles of bricks, BPMN process models are the instructions to assemble those bricks into desired models or outcomes. Hence much like the Lego analogy, from a few re-usable services, I can use BPMN processes to assemble a multitude of useful outcomes. With the trend towards public API’s and the ease of access to cloud based services, my Lego kit just got a whole lot larger! Amazon Web Services (AWS) recently released additional Artificial Intelligence (AI) services into their Platform as a Service (PaaS) offering. One in particular called Rekognition caught my attention. Rekognition includes a set of image processing...

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  • Citizen Identity Enrolment using BPMN and DMN

    Citizen Identity Enrolment using BPMN and DMN At a recent ‘Hack Day’, I decided I wanted to explore a combined BPMN and DMN solution using the latest Camunda implementation. For a use case I settled on identity enrolment. Identity enrolment requires a combination of process, interactive user tasks and is rich in decision logic. Hence a perfect use case for the combined offering. At a high level, identity enrolment can be abstracted to the following pattern. An applicant makes a claim over an identity and presents supporting evidence to substantiate their claim. This evidence is then verified and a decision made based on the weight of supporting evidence, whether the applicant’s claim over the identity is accepted or not. In...

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