Add first iteration of selection. Refs #14

feature_selection/01-iteration.md

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+## First iteration
+
+### Features
+We have three features, the Scara which is the hardware arm that move the marker locally.
+The end-effector is connected to the end of the Scara and has the task to lift the marker from the board and to release it.
+And the last feature is the carriage which has the task to move the Scara with the end-effector.
+Sub feature of the carriage will be some kind of base structure where the Scara will be mounted on.
+In this base we will also store the different tools.
+
+### Selection table
+We constructed the following table to select a feature.
+From this we can derive that the end-effector is prefered over the carriage.
+
+| Feature      | Dependency   | Test Coverage | Risk   | Time   | Risk/Time factor |
+|--------------|--------------|---------------|--------|--------|------------------|
+| Scara        | End-effector | 3             | medium | medium | 1                |
+| End-effector | -            | 2             | high   | medium | 2                |
+| Carriage     | -            | 2             | low    | medium | 0.5              |