This post is part of a series showing my working through the 2025 Advent of System Seeing exercises set by Ruth Malan. For background see the introduction . As we reach the final few days of exercises we're into reflection and consolidation of ideas. Day 20 Task : (1) Look across the past 19 days and draw out concepts related to systems (2) Consider what else you'd like to add (3) Jot down some questions (4) What topic would you like to add, as the focus of another page on your System zine? Components: parts, relationships, boundaries, effects, feedback, change over time, inputs and outputs, failure modes, context, constraints. Tools: zoom in/out, follow a specific path, take actor perspectives, use multiple models, identify needs (and who they belong to), identify causes (and the causes of the causes), focus on the parts of the system that matter today, don't forget how we got here, identify constraints and assumptions. Questions/Missing: Seeking/exploiting existin...