All Tools

Analytical/Estimate Questions

Question Bank ๐Ÿ‘€



Ask clarifying questions
  • Problem Clarification: Seek clarity on the specific details and context of the estimation task.

  • Input Requirements: Inquire about any data or variables required for accurate estimation.

  • Assumption Validation: Confirm if assumptions can be made and whether there are any constraints to consider.

Sample Answer ย ย 
  • Are you interested in all types of street lamps, including traditional and LED?

  • Do you want an estimate for the entire city or a specific borough?

  • Are you looking for an estimate of currently installed street lamps, or do you want to include planned installations?

  • Is there any specific time frame you want the estimate for?

Define an approach
  • Scope Breakdown: Divide the problem into manageable components for a structured analysis.

  • Assumption Clarity: Clearly state assumptions made to simplify calculations and reasoning.

  • Method Selection: Choose an appropriate estimation method (analogous, parametric, expert judgment) based on problem characteristics.

Sample Answer ย ย 
  • Identify the borough or area within New York City for the estimate.

  • Determine the type of street lamps to include in the estimate.

  • Consider both currently installed street lamps and planned installations for a more comprehensive estimate.

  • Use a sample area to calculate the density of street lamps per unit area.

  • Apply the density to the total area of New York City to estimate the total number of street lamps.

Assumptions and calculation
  • Simplify Inputs: Use round numbers to streamline calculations and avoid unnecessary complexity.

  • Quick Approximations: Focus on obtaining a ballpark figure rather than precise results.

  • Iterative Refinement: Start with broad assumptions and refine as needed for better accuracy.

Sample Answer ย ย 
  • Assume we're estimating for all five boroughs of New York City.

  • Let's consider an average density of 150 street lamps per square mile (58 street lamps per square kilometer). This is a general approximation that takes into account various types of areas within the city.

  • The total area of New York City is around 468.9 square miles (1,213.4 square kilometers).

  • Sample Calculation: Estimated Total Street Lamps = Average Density * Total Area = 150 lamps/mileยฒ * 468.9 mileยฒ โ‰ˆ 70,335 street lamps

  • Convert the result to a more readable format: Estimated Total Street Lamps โ‰ˆ 70,335

Sense-checking your result
  • Reality Check: Evaluate if the results align with reasonable expectations or industry norms.

  • Common Sense: Ensure the outcome makes sense logically and practically.

  • Cross-Verification: Validate results using alternative estimation methods if available.

Sample Answer ย ย 
  • The estimated result aligns with the scale and urban nature of New York City.

  • The density used is an approximation, and the actual distribution of street lamps can vary across different neighborhoods.

  • Changes in city planning and development can impact the accuracy of the estimate.

  • Conclusion Highlight: Recap the estimated value or outcome in a succinct manner.

  • Assumption Recap: Summarize key assumptions made during the estimation process.

  • Confidence Statement: Express your confidence level in the result based on the approach and checks performed.

Sample Answer ย ย 
  • Based on an average density of 150 street lamps per square mile, the estimated total number of street lamps in New York City is approximately 70,335.

  • This is a rough estimate that considers the entire city's area and various types of neighborhoods.