Why there are assumptions for Cost-volume-profit analysis?

Answer 1

1.Selling price is constant.

2.Costs are linear and can be accurately divided into variable (constant per unit)

and fixed (constant in total) elements.

3.In multiproduct companies, the sales mix is constant.

4.In manufacturing companies, inventories do not change (units produced = units

sold)

Answer 2

The Break-even Analysis depends on three key assumptions:- Average per-unit sales price (per-unit revenue):

This is the price that you receive per unit of sales. Take into account sales discounts and special offers. Get this number from your Sales Forecast. For non-unit based businesses, make the per-unit revenue $1 and enter your costs as a percent of a dollar. The most common questions about this input relate to averaging many different products into a single estimate. The analysis requires a single number, and if you build your Sales Forecast first, then you will have this number. You are not alone in this, the vast majority of businesses sell more than one item, and have to average for their Break-even Analysis.

Average per-unit cost:

This is the incremental cost, or variable cost, of each unit of sales. If you buy goods for resale, this is what you paid, on average, for the goods you sell. If you sell a service, this is what it costs you, per dollar of revenue or unit of service delivered, to deliver that service. If you are using a Units-Based Sales Forecast table (for manufacturing and mixed business types), you can project unit costs from the Sales Forecast table. If you are using the basic Sales Forecast table for retail, service and distribution businesses, use a percentage estimate, e.g., a retail store running a 50% margin would have a per-unit cost of .5, and a per-unit revenue of 1.

Monthly fixed costs:

Technically, a break-even analysis defines fixed costs as costs that would continue even if you went broke. Instead, we recommend that you use your regular running fixed costs, including payroll and normal expenses (total monthly Operating Expenses). This will give you a better insight on financial realities. If averaging and estimating is difficult, use your Profit and Loss table to calculate a working fixed cost estimate-it will be a rough estimate, but it will provide a useful input for a conservative Break-even Analysis.