What is parametric cost estimating?

Parametric cost estimating is a parametric technique that uses regression or other statistical methods to develop Cost Estimating Relationships (CERs). A CER is an equation used to estimate a given cost element using an established relationship with one or more independent variables.

What are the 3 main methods of cost estimating?

Methods of Cost Estimation in Projects – Tools and Techniques

• Expert Judgement Method.
• Analogous Estimating Method.
• Parametric Estimating Method.
• Bottom-up Estimating Method.
• Three-Point Estimating Method.
• Data Analysis Method.
• Project Management Information System Method.
• Decision-Making Method.

What are the cost estimation techniques?

4 Project Cost Estimation Techniques

• Analogous Estimating. Through analogous estimating, a project manager calculates the expected costs of a project-based upon the known costs associated with a similar project that was completed in the past.
• Parametric Estimating.
• Bottom-Up Estimating.
• Three-Point Estimating.

What is an example of a parametric estimate?

Parametric estimating, a more accurate technique for estimating cost and duration, uses the relationship between variables to calculate the cost or duration. For example, if it took me two hours to mow my one acre yard last week and this week I’m mowing four acres, I could estimate that it will take eight hours to mow.

What is the difference between analogous and parametric estimating?

Analogous estimation: House A is about the same size as house B so it will probably take about the same amount of paint as the previous project. Parametric estimation: A gallon of paint covers X square feet. Based on a house of a certain size, we may calculate the amount of paint required.

Which estimating technique is most accurate?

The bottom-up estimating technique is also called the “definitive technique.” This is the most accurate cost estimation tool, but it consumes time and resources.

What is the high-low method?

The high-low method is an accounting technique used to separate out fixed and variable costs in a limited set of data. It involves taking the highest level of activity and the lowest level of activity and comparing the total costs at each level. However, users must be cautious of the high-low method.

Which type of cost estimate is the most accurate?

An analytic estimate (also called bottom-up estimating) is one of the most accurate cost estimation techniques—but it can also be time-intensive. Bottom-up estimating breaks the project down into smaller parts and then creates cost estimates for those variables.

Which estimating method is best?

The most important estimate methodologies are factor estimating, parametric estimating and detailed estimating:

• Factor estimating. Factor estimating, also known as top-down estimating, is based on limited project scope.
• Parametric estimating.
• Detail Estimating.

Which is the most accurate cost estimation method?

analytic estimate
Analytic. An analytic estimate (also called bottom-up estimating) is one of the most accurate cost estimation techniques—but it can also be time-intensive. Bottom-up estimating breaks the project down into smaller parts and then creates cost estimates for those variables.

When was the parametric cost estimating model developed?

The data consist of 168 new building projects, built from 1990 to 2000. The technique of multiple regression analysis is used to develop the parametric cost estimating model by establishing the cost estimating relationships between the building parameters and the building construction cost.

How is Parametric estimating used in project management?

Parametric Estimating is used to Estimate Cost, Durations and Resources. It is a technique of the PMI Project Management Body of Knowledge (PMBOK) and produces deterministic or probabilistic results. Skip to content

When to use parametric or bottom up cost estimates?

Parametric and bottom-up estimates are usually the techniques that provide the most accurate cost projections. They are commonly used if the budget needs to be revisited and replaced with a new estimate at completion.

How is seer used in parametric cost estimating?

With an extensive data base of project performance characteristics from a wide range of projects derived from both commercial and aerospace applications, Galorath’s SEER parametric modeling software provides users with proven and easy to use parametric cost modeling capabilities. Parametrics are what drive Galorath’s SEER models.