| Course | BU 442 Cost and Time Management |
|---|---|
| Unit | Unit 1 |
| Paper type | Estimating methods paper |
| Length | About 1,020 words, 6 pages |
| Format | APA 7 student paper |
| School | Herzing University |
| Program | BS in Project Management |
| Updated | September 2026 |
Free sample paper for BU 442 Unit 1
Which Number to Trust When: An Estimating Methods Paper Comparing Analogous, Parametric, Bottom-Up and Three-Point Estimates for a Composite Fort Wayne Shared Kitchen
Student Name
Business, Herzing University
BU 442: Cost and Time Management
Instructor Name
January 14, 2026
Which Number to Trust When: An Estimating Methods Paper Comparing Analogous, Parametric, Bottom-Up and Three-Point Estimates for a Composite Fort Wayne Shared Kitchen
The Project the Methods Are Tested On
Fort Wayne Food Works, a composite nonprofit created for this course, plans to convert a vacant 12,000-square-foot former hardware store in Fort Wayne, Indiana into a shared-use commercial kitchen. Small food businesses will rent time at six prep stations, store goods in walk-in coolers and a freezer, and take classes in a teaching kitchen. The board needs a cost figure for a grant application in February, a better one for a construction loan in the spring, and a reliable one to manage the work. Those three moments call for different estimating methods, and this paper compares four of them on the same project: analogous, parametric, bottom-up and three-point estimating.
Each method is judged on the accuracy it can reach, the data and effort it needs and the point in a project at which it is defensible. AACE International (2020) classifies estimates by how mature the project definition is, from Class 5, used when a project is barely defined and may be off by half or more, to Class 1, prepared from nearly complete design with ranges of a few percent. The classification is a useful reminder that no method is accurate in itself; accuracy depends on what is known when it is used.
Analogous Estimating
An analogous estimate scales the cost of similar past projects. Food Works found published cost reports for two shared kitchens completed in the Midwest in 2023, averaging about $118 per square foot for conversion of existing buildings. Adjusted for two years of cost increases, the analogous estimate for 12,000 square feet is about $1.42 million.
The method needs little data and less than a day of work, which is why it suits the grant application. Its weakness is that the two projects may differ in ways the average hides: one had an existing grease interceptor, and neither needed a new electrical service. Flyvbjerg (2006) argues that the most reliable form of analogous estimating uses a whole class of similar projects and their actual outcomes, not one or two examples, because planners otherwise anchor on the most favorable comparison. With only two comparisons, this estimate is a Class 5 figure and should be presented as a range, roughly $1.0 million to $2.1 million, not as a number.
Parametric Estimating
A parametric estimate multiplies a cost driver by a rate. For Food Works, the drivers are floor area by type of space and the linear feet of kitchen exhaust hood. Using composite rates from a regional cost guide, 6,500 square feet of kitchen at $145, 2,500 of storage at $60 and 3,000 of classroom and office at $70 give about $1.30 million, before hoods. Adding 48 linear feet of hood at about $3,400 per foot gives about $1.47 million.
Parametric estimating is more accurate than an analogy when the drivers genuinely explain cost and the rates come from enough projects, and it takes a day or two once the space plan exists. It fails when a project has a cost the drivers do not capture. Here, that cost is the building's electrical service, which is far too small for commercial cooking and has nothing to do with floor area. A parametric estimate is defensible for the construction loan request once a space plan exists, provided the analyst adds separate allowances for costs outside the model.
Bottom-Up Estimating
A bottom-up estimate prices every element of the work from quantities and unit rates, then adds them. It requires a work breakdown, design drawings detailed enough to take off quantities, and quotes or rates for each trade. For Food Works that means about three weeks of effort once design reaches roughly 60 percent. Its accuracy is the highest of the four, typically within about 10 to 20 percent at that stage, because it finds the costs that the other methods average away, such as the electrical service and a grease interceptor sized for six tenants.
Its weaknesses are cost and false confidence. Adding hundreds of lines produces a precise-looking total, but each line carries its own uncertainty, and errors of omission, a forgotten line, are not visible in the sum. Kerzner (2017) notes that bottom-up estimates are the most accurate and the most expensive to prepare, which is why they belong to the stage when funding is committed, not to early screening.
Three-Point Estimating
Three-point estimating asks for an optimistic, most likely and pessimistic value for an element and combines them, often with the weighted average used in the PERT technique: optimistic plus four times most likely plus pessimistic, divided by six. The method was developed for research and development programs where durations were highly uncertain (Malcolm et al., 1959). It is not an alternative to the others so much as a way to record uncertainty inside them. For Food Works, it suits the elements where the range is wide and asymmetric: the electrical service upgrade might cost $100,000 if the utility's transformer is adequate, $115,000 most likely, and $150,000 if it must be replaced.
Three-point estimates take more effort per line than single figures and depend on the honesty of the pessimistic value, which estimators often understate. They are defensible whenever an element is uncertain, and they supply the spread from which contingency can later be calculated.
When Each Method Is Defensible
The methods are not rivals; they belong to different moments. Food Works should use an analogous range for the February grant application, clearly labeled as early. It should use a parametric estimate with separate allowances for the electrical service and grease interceptor when the space plan is complete in March. It should prepare a bottom-up estimate at about 60 percent design for the construction loan and budget, with three-point values on the uncertain elements so that contingency can be derived rather than guessed. Using a bottom-up method too early wastes weeks on quantities that will change; using an analogous figure too late gives the board false comfort. Fort Wayne Food Works and every rate and figure here are composites for this course.
References
AACE International. (2020). Cost estimate classification system: As applied in engineering, procurement, and construction for the process industries (Recommended Practice 18R-97). AACE International.
Flyvbjerg, B. (2006). From Nobel Prize to project management: Getting risks right. Project Management Journal, 37(3), 5-15. https://doi.org/10.1177/875697280603700302
Kerzner, H. (2017). Project management: A systems approach to planning, scheduling, and controlling (12th ed.). Wiley.
Malcolm, D. G., Roseboom, J. H., Clark, C. E., & Fazar, W. (1959). Application of a technique for research and development program evaluation. Operations Research, 7(5), 646-669. https://doi.org/10.1287/opre.7.5.646
BU 442 Unit 1 instructions, in plain terms
The first BU 442 unit asks students to explain and compare cost or duration estimating methods. Most prompts name analogous, parametric, bottom-up and three-point estimating and want each described, evaluated on accuracy, data needs and effort, and matched to the project stage where it is appropriate. Many instructors ask for a worked example or at least a case to anchor the comparison, while stopping short of a full estimate, which comes in the next unit. Sources on estimate classification, reference class forecasting or PERT strengthen the discussion. The paper usually runs a few pages in APA 7. A strong submission explains that accuracy depends on how much is known when a method is used.
Inside the BU 442 Unit 1 example
The paper opens with the project and three moments when the board needs a cost figure. It then introduces the AACE classification to link accuracy to design maturity. Each of the four methods has its own section: how it works, the figure it gives for this project, the data and effort it needs, and where it fails in this specific case. The analogous section cites research on reference class forecasting and presents the result as a range. The parametric section shows the drivers and rates. The bottom-up section explains its accuracy and its false precision. The three-point section uses the electrical service as an example. The final section assigns each method to a stage of the project.
Reading the BU 442 Unit 1 rubric
Herzing's estimating methods rubric usually rewards accurate explanation of each method, a comparison on accuracy and effort, appropriate matching to project stages, use of an example or case, and sound sources, with the writing itself also scored. Explanation earns credit when each method's mechanics are described correctly. Comparison scores highest when accuracy is tied to project definition rather than stated as fixed. The stage criterion rewards specific guidance on when each method is defensible. Examples earn points when the same case is used for every method, making the comparison concrete. Sources such as AACE guidance or research on estimating bias are credited more than generic textbook descriptions.
Common BU 442 Unit 1 mistakes, and how to avoid them
Estimating papers often lose points by defining each method in turn without comparing them. Another common problem is ranking methods as simply more or less accurate, ignoring that accuracy depends on the information available. Students frequently omit three-point estimating's role in recording uncertainty, treating it as just another way to get a single number. Some use a different example for each method, which prevents real comparison. Others present early analogous figures as precise numbers rather than ranges. Papers also skip the costs no driver captures, which is where parametric estimates fail. Finally, borrowing estimates from a real employer's projects may breach confidentiality; composite figures show the same reasoning.
Get a BU 442 Unit 1 example written to your instructions
Upload the Unit 1 instructions together with the rubric your BU 442 section posts, plus any project or case the assignment names. We write a custom example that fixes the purpose first, runs the same four questions across every method, cites its error ranges and closes on a timeline argument. First custom sample free, back in 24 to 48 hours.
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BU 442 Unit 1 questions, answered
How is this different from estimating in a project management course?
The earlier course produces an estimate so the project can be approved. This one asks how the number was made and how much confidence it deserves, which is why the methods themselves are the subject here. If your draft ends with a total and no discussion of the approach that produced it, it has answered the wrong question for BU 442.
Do I need to produce an actual estimate in this unit?
Usually not, and adding one can crowd out the comparison the criterion is looking for. Most sections keep the numbers for later units and want the reasoning here. A short worked fragment showing how two methods would treat the same element can be worth including, provided the figures are labeled as belonging to the case rather than presented as costs.
Can I use estimates from projects I work on?
Not the material itself. Cost baselines, rate cards, timesheet records and the schedule data your employer keeps are internal property, and a graded paper travels outside the company. Argue from the course reading and whatever case the assignment supplies. Having seen real estimates will make you a sharper writer here, but none of that paperwork belongs in a submission.
Where can I find a free BU 442 Unit 1 sample paper?
The complete BU 442 Unit 1 estimating methods paper is published above for free, with all four methods applied to one project and margin notes. Working on another building or product? We adapt the comparison to your case without charge, usually inside two days.
Do I need an actual estimate in BU 442 Unit 1?
Usually not a full one. The sample produces a rough figure for each method to show how they differ on the same project, then leaves the detailed bottom-up estimate to Unit 2.