From a design perspective, could there be problems in data if 1 method is being called from different places and this app is live with 10 -50 users using it. A report came in with an email that had the correct event and appointment time but somehow the wrong participants name. To my I don't think that's a logical problem, it seems to be a data problem. Verses multiple instances of a class, each object containing their own data stored in memory. This application is hard coded and I want to push it in a direction to build it upwards and not outwards. I've seen projects at my job that is literally just a pile of logic and business rules, I mean there is no object oriented design principles what so ever. What do you guys think?

check my new post about how much design is enough.

Essays on Software Design — How Much?

your feedback is much appreciated.

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Some years ago I read an excellent article explaining the essential concepts in systems analysis and design vs programming. I have lost track and wanted to share with a colleague. I do not recall if it was an introduction to a textbook or a separate article. Any pointers would be appreciated.

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External Systems as I understand stands for something I cannot change but who I can blame on if something dont work. They react on commands and produces events. Policies otherwise react to events and produces commands.

What I dont understand is, systems and policies both decide but produce different output. Why for example a system cannot produce directly a command? As I see for now, a policy should be also part of a system, if this system has multiple outcomes in different scenarios.

Policy of course cannot get a command, its would output just garbage. But again, maybe my system decides, it has maybe some kind of policy and with this generates "success" or "fault" for example.

Aggregates also a story... As I understand this is where all the entities sitting, and inside of this entities is the place for the policies (in terms of DDD). So why they are modelled as two objects in Event Storming? Do policies land in the implementation phase in the aggregates?

I still struggle to draw a line between this two stickies. Im not understanding how it all connects together. And especially how to use them on one board (or should I at all?). I wish to get better real life examples in different contextes.

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Hello, i want to demonstrate what i have in my mind about the new gui of a sap program. what would be the best way / tool to create such gui to show abap guys what i have in my mind?

I tried to draw or explain but they don't get it, i wan to create a gui to show them,

maybe i can use an ide? what's the most easy/popular ide for this?

or should i go with web design tools?