Jann Launer

# Getting started > Contribution is already possible on a low level Workflow could be described in more detail. ## Installing oemof Installing oemof is double: In getting started and...

Trying to bring some new live to that topic. As I understand it, oemof.tabular's facades can be nicely imported as part of oemof's namespace like this: `from oemof.tabular import facades`...

Let's give that topic some new life :) A short, possibly non-representative wrap-up: First, @uvchik proposed to differentiate facades and components. * Components expect Flow objects * Facades expect buses...

How about this: We could move the parent class of the facades from oemof-tabular to oemof-solph. Then all future facade could inherit from that class. What do you thing @gnn...

> An important question is open though (at least for me): How to build facades that wrap a couple of oemof-solph components? E.g., the heat pipeline, which would connect two...

We (@franziPL and @jnnr) tried to sort the different suggestions and we found 3 main distinctions that are more of less orthogonal: **1. pre-calculations inside the component vs. outside in...

@FranziPl will write some more related thoughts that apply to the subnetworks in #577

In earlier versions of oemof, there has been a fixed_costs attribute. It was discussed and decided to be removed here [PR396](https://github.com/oemof/oemof/pull/396) and here [PR407](https://github.com/oemof/oemof/pull/407). The argument was that in operational...

After some discussion, I understand that the term equivalent periodical costs is meant to be quite general. If you check Wikipedia, you find equivalent annual costs that include maintenance: https://en.wikipedia.org/wiki/Equivalent_annual_cost

To linearize the constraints, could express the products of two status variables x and y as a new variable z and set ``` z