The black box vs glass box debate reminds me of driving a car. Most drivers don’t want to know how the transmission works; they just want to hit the gas and get moving. But when the mechanic pops the hood, they expect full detail: what failed, why it failed, and how confident they are in the fix. AI is no different.
The way you design prompts decides whether you’re handing people the steering wheel or giving them the service manual. That’s why prompt engineering is so powerful. If you just say, “why is the machine failing,” you’ll get a vague black-box answer. If you say: “act like a packaging engineer, explain three likely causes, show your reasoning, and give a confidence score”, suddenly you’ve turned the same AI into a glass box.
From my experience, there are seven simple prompt-engineering levers that decide how much transparency you get:
Clarity – Be specific in the ask.
Context – Set the scene (industry, process, audience).
Role assignment – Tell the AI who it is.
Step-by-step reasoning – Don’t just ask for answers, ask for the logic.
Structure – Tables, bullet lists, confidence percentages.
Examples – Show what “good” looks like.
Iteration – Test, tweak, and refine just like Continuous Improvement work.
The line between explainability and simplicity isn’t fixed. For operators, I keep prompts tuned for speed: one likely cause, one action. For leadership, I dial up transparency: full rationale, trade-offs, and scores. Same AI, same data, but by engineering the prompts, you control the “glass tint” of the box.
So, for me, it’s not really black vs glass. It’s about building adjustable transparency into the flow. AI should be like a dashboard: quick lights for speed, and detailed readouts when you need to pop the hood. Prompt engineering is what makes that possible.