1. Informal Language:

* Guesstimate: This is a blend of "guess" and "estimate," indicating a rough calculation based on limited information or intuition. It's informal and often used in casual settings.

* Suboptimal: This means "not the best possible," "less than ideal," or "second best." It's a more formal way of saying something is not perfect, but still acceptable.

2. Approximations and Compromises:

* Guesstimate: A guesstimate represents an approximation, a rough estimation made without precise data. It's often used when precise data is unavailable or when quick decision-making is needed.

* Suboptimal: Suboptimal outcomes occur when a solution is not the best possible, but is considered acceptable given constraints or limitations. This implies a compromise or a less-than-ideal scenario.

3. Problem-Solving and Decision-Making:

* Guesstimate: Guesstimates can be useful in initial brainstorming or when exploring possible solutions with limited information.

* Suboptimal: The concept of suboptimality arises when evaluating different solutions or choices. It helps identify solutions that are "good enough" even if they aren't perfect.

4. Communication:

* Guesstimate: Using "guesstimate" can convey informality and acknowledge the uncertainty involved in a calculation.

* Suboptimal: "Suboptimal" is a more formal way to describe a less-than-ideal situation, often used in technical or professional contexts.

Examples:

* Guesstimate: "I'd guesstimate that there are about 100 people in the park."

* Suboptimal: "The current plan is suboptimal, but it's the best we can do with the limited resources available."

In summary, "guesstimate" and "suboptimal" describe situations where there's a lack of perfect information or ideal solutions, but they are used to make decisions and communicate effectively.