# Wiki Sandbox

• Complexity is determined by activity
• If a system has complicated internal components, but they're hidden behind well-designed interfaces and rarely need to be modified, then the system is not complex
• Complexity can be thought of as
• → Overall complexity
• → complexity of each part
• → fraction of time spent working on part

The above directive is only needed once per page

• Complexity is determined by activity
• If a system has complicated internal components, but they're hidden behind well-designed interfaces and rarely need to be modified, then the system is not complex
• Complexity can be thought of as {$C = \sum_p c_p t_p$}
• {$C$} → Overall complexity
• {$c_p$} → complexity of each part {$p$}
• {$t_p$} → fraction of time spent working on part {$p$}