针对操作单一对象的多动作方法，有合适的优化设计模式吗？

I'm dealing with a function that orchestrates multiple actions to transition a core Object from state A to state B. Originally, all logic was packed into a single monolithic function, which quickly became unmanageable:

function hugeAction(...) { 
  ... 
  perform sub-action 1 
  ... 
  perform sub-action 2 
  ... 
  perform sub-action 3 
  ... 
  perform sub-action 4 
  ... 
  perform sub-action 5 
}

All these actions operate on the same Object, and while the first 2-3 sub-actions have strict execution order requirements, the rest can run in any sequence. Keeping everything in one place made the function overly complex and hard to maintain.

To fix this, I split the logic: I kept the critical ordered actions inside hugeAction, and dispatched an event (XXX) that triggers the remaining actions via a subscriber module:

function hugeAction(...) { 
  ... 
  perform action 1 
  ... 
  perform action 2 
  ... 
  dispatch event XXX 
}

class SubscriberXXX extends YYY { 
  function performHugeActionPart3() { ... } 
  function performHugeActionPart4() { ... } 
  function performHugeActionPart5() { ... } 
}

This works for now, but I'm worried about long-term maintainability. Anytime I need to modify existing subscriber logic or add new sub-actions, I have to keep the entire system structure and the flow of hugeAction fresh in my mind. It feels like the connection between hugeAction and the subscriber is too implicit, which could lead to bugs or missed edge cases down the line.

A quick note: this isn't a fit for Factory/Builder patterns—these are all auxiliary operations that support the core state transition (things like adding system comments, generating payment transactions, updating project statuses, sending notifications, etc.).

I'm looking for advice on how to structure this to improve maintainability without losing the flexibility of running non-critical actions in any order, while keeping the implicit dependencies more explicit.

内容的提问来源于stack exchange，提问作者AndrewShmig