Table of Contents
Introduction
What Is a Supplier Quote?
What Is Should-Cost?
Why Supplier Quotes and Should-Costs Differ
What Cost Drivers Should Manufacturers Examine?
Supplier Quote Vs Should-Cost – A Real-World Scenario
How Procurement Teams Can Use the Cost Gap
When a Higher Supplier Quote May Actually Be Justified
From Price Comparison to Cost-Based Negotiation
How Cost It Right Helps
Conclusion
FAQs
Introduction
Normally, when a manufacturer requests a quotation from multiple suppliers, the result is obvious: several quotations with different prices for the same part. The obvious solution is to compare the offers and negotiate with those who have provided high quotations.
At the same time, a supplier quotation is determined by several factors, including material consumption, technology, machine rates, labor, tooling, overheads, scrap, and profit. Therefore, two quotations can differ for various reasons, which are not related to the supplier’s intention to increase the cost.
Thus, should-cost analysis helps to evaluate supplier quotations against an independent cost benchmark. By comparing quotations with should-cost, procurement and sourcing managers can identify cost-saving opportunities and evaluate the supplier’s cost structure to identify where savings can be achieved. This blog describes the difference between quotations and should-cost, the main cost drivers, and how manufacturers can benefit from should-cost analysis.
What Is a Supplier Quote?
A supplier quote provides a manufacturer with a final commercial price of the component by supplier, but the figure itself may say little about how exactly this particular sum was reached by the supplier.
The quoted price may comprise:
• Setup
• Labour
• Tooling and dies
• Scrap and rejection
• Supplier’s margin
• Machine and process
• Logistics or packaging
• Cost of raw materials
• Manufacturing overheads
• Material consumption and utilization
However, these individual costs are not always apparent in the final quotation. Therefore, two suppliers can provide two different prices for the same manufacturing task due to differing production methods, assumptions about materials, machinery, tooling, processes, overheads, and commercial margins.
Thus, we can conclude that a quoted price is in effect an output, which should be qualified by examining the individual cost drivers that determine it.
A supplier’s quotation tells the manufacturer what a supplier is asking for the component, whereas a should-cost analysis provides an independent assessment of what the component should cost, given its manufacturing requirements and cost drivers.
The key takeaway:
A supplier’s quotation provides the manufacturer with the final price, while the breakdown of cost provides an explanation of the figures. This distinction is critical to recognizing that while the lowest possible quoted price may seem attractive, it should be evaluated within the context of the manufacturing requirements and related costs.
What Is Should-Cost?
A should-cost is an analytical methodology to determine what a product, component, or part should cost to manufacture based on its elemental cost drivers and manufacturing requirements.
A should-cost analysis contrasts with a supplier quote, which is a proposed cost from an external supplier for a good or service. The former is an independent calculation based on the cost elements considered necessary for a particular product or component.
Depending on the component/part and its manufacturing process, these could include material, material utilization, labor, machinery and process, tooling, overheads, yield and rejection, and production volume.
Together, these elements constitute the should-cost model.
For example, if a component has been quoted at ₹125 by a supplier, but the should-cost analysis indicates that the component should cost ₹105 based on the above factors, the ₹20 variance will be investigated by the buyer.
The rationale for such a variance and its practicality in a given context will dictate the extent to which the supplier’s costs are fair, if not reasonable. Should-cost analysis therefore plays a critical role in supplier evaluation, cost validation, sourcing strategy development, and negotiation.
Why Supplier Quotes and Should-Costs Differ
A supplier quotation and a should-cost estimate for the same component may well differ, as they are based on fundamentally different viewpoints. Whereas a should-cost model is built from the manufacturer’s viewpoint and requirements, a supplier’s quotation represents their processes, constraints, commercial and cost considerations, and assumptions.
Several factors could explain the difference between the two.
Different Material Assumptions
A supplier could adopt different assumptions in relation to material grade, material price, quantity, and consumption. Even small differences in material utilization or R & D offsets could have a significant effect on the final cost of the component.
Different Manufacturing Processes
The same component could be manufactured using different process routes, machines, and degrees of automation, resulting in significantly different manufacturing costs.
Different Machine and Labour Rates
Variation in machine rates and labour costs depending on the equipment, personnel, utilization, and organizational structure could affect the manufacturing costs in the quotation.
Tooling and Set-up Considerations
Different assumptions in relation to tooling, dies, fixtures, and set-up could affect the costs. Set-up costs could be amortized differently depending on the production volumes.
Overheads and Commercial Considerations
A supplier could apply different overhead rates to arrive at the final quotation. In addition, varying commercial elements such as capacity, volumes, priorities, and supplier-specific commercial models could affect the quotation.
Different Costing Assumptions
Sometimes, the only reason for a difference between the supplier’s quotation and the should-cost model is that the two figures are based on different assumptions. If the assumptions are not explicitly laid out, the purchasing team may wrongly assume that the supplier is taking unfair advantage of the situation. A large variance between the should-cost and the supplier quotation should not necessarily trigger suspicion of supplier manipulation, but instead lead to an in-depth analysis of the cost drivers for the two figures.
In order to understand the difference between the should-cost model and the supplier quotation, it is vital to identify the specific cost drivers that contribute to the variance. The next step is to discuss the cost drivers that could affect a manufacturer’s should-cost estimate and a supplier’s quotation.
What Cost Drivers Should Manufacturers Examine?
The cost drivers, manufacturers should examine depend on the component and manufacturing process, but typically include material, labour, machine and process costs, tooling, overheads, utilization, scrap, and production volume.
A should-cost analysis is only valuable if the cost can be dissected into its underlying cost drivers. Otherwise, questioning the final price is useless because it fails to explain what drives the difference.
The key cost drivers are discussed below:
5.1 Raw Material Cost
Raw material is frequently the biggest determinant of manufacturing cost. The type, grade, market cost, and quantity are vital cost drivers in material. A should-cost analysis focuses on the actual material needed to make the part, not the quoted material cost in the supplier’s price breakdown.
5.2 Material Utilization and Scrap
Material utilization is the proportion of the purchased material that is turned into the finished component. Inefficient utilization increases the effective material cost, even if the cost of raw materials is low.
Scrap resulting from cutting, forming, machining, or any other process also influences the cost of the saleable component. Thus, material utilization and differences in the assumptions about scrap between the supplier quotation and should-cost can help explain cost variances.
5.3 Labour Cost
Labour cost is determined by the time, manpower, skill level, and wages needed to produce a part. Variations in these factors may explain discrepancies between the supplier’s quote and should-cost. A should-cost model can analyze labour from the viewpoint of required operations and their processing time rather than the supplier’s price.
5.4 Machine and Process Cost
Various factors determine the costs of machines and processes, including the machine rate, cycle time, setup time, process selection, capacity, the number of operations, and the level of automation.
Different suppliers could adopt various approaches to produce the same item. As a result, they might use different machines or process routes for a particular product. In turn, this will affect the manufacturing cost. Thus, to analyze whether the estimated cost of a product is reasonable, it should be compared to the should-cost, which is based on some assumptions about process and technology.
5.5 Tooling and Setup Costs
Tools, dies, fixtures, and other equipment needed to manufacture the component can add significantly to its cost – especially if the production volume is small or the tooling cost is high.
The analysis should look at tooling investment, expected tool life, setup requirements, and how the tooling costs are recovered over the production volume.
5.6 Overheads
Overheads are indirect costs associated with manufacturing such as taxes, maintenance, supervision, facilities, and other expenses, which can differ significantly among suppliers.
Should-cost analysis helps assess if the overheads built into the supplier’s quotation are realistic for the manufacturing process and production conditions.
5.7 Production yield, Rejection and Rework
Production yield, rejection, and rework all affect the quantity of an acceptable product that has been produced through a manufacturing process. An increase in the percentage of rejections or reworks will increase the effective price of a saleable component.
The comparison of yield and quality assumptions provides insight on why the difference occurs between the supplier quotation and should-cost.
5.8 Production Volume
Production volume affects the cost per unit due to fixed and semifixed costs such as tooling, setups, and other overheads that are spread out over the production quantity. Consequently, should-cost estimates should be made for the expected production volume because the same part can have different economics at different volumes.
Bringing the Cost Drivers Together
All of these cost drivers are not independent of each other. Material, utilization, process selection, labour, tooling, yield, overheads, and production volume are several factors that determine the final cost of manufacturing.
A should-cost model allows considering all of these elements to establish a reference cost baseline because comparing a projected quotation with this baseline reveals the significant variances that require closer examination.
Supplier Quote Vs Should-Cost: A Real-World Scenario
Imagine a company buying a machined part from three suppliers.
Supplier Quoted Price per Part:
| Supplier | Quoted Price | Difference vs. Should-Cost |
| Supplier A | ₹100 | ₹5 lower |
| Supplier B | ₹112 | ₹7 higher |
| Supplier C | ₹125 | ₹20 higher |
| Should-Cost | ₹105 | Benchmark |
By simply looking at the numbers, one can say, ‘Supplier A offers the best price’. But why are the numbers different? Is there a rationale behind the difference? Is there a ‘correct’ price?
Now, assume that the should-cost estimate for the part is ₹105, based on certain assumptions about the material, process, labour, machine, tooling, overhead, and volume.
What is the next step? Can the buyer directly conclude that Supplier C is the worst option, and Supplier A is the best option based on hard data?
Not necessarily.
Interpretation of Price Difference
It depends on the rationale behind the ₹20 difference in the quote from Supplier C versus the should-cost. It would help if the buyer digs deeper to understand the process and assumptions made by Supplier C to arrive at the quoted price.
For example,
Is the material price higher?
Is the material utilization lower?
Is the cycle time higher?
Is a different machine being used?
Are the tooling costs higher?
Are labour rates or overhead different?
Is there a different assumption about the quantity?
Similarly, if Supplier A quotes ₹100 instead of ₹105, the buyer should understand what led to the ₹5 difference versus should-cost. It could be that the supplier has a better process with lower overhead or utilizes material more efficiently. Unless the assumptions are understood, the buyer cannot decide if ₹5 difference is worth it.
From Price Comparison to Cost Insight
At this point, the value of should-cost analysis becomes clear. The goal is not to identify a ‘correct’ price, but provide an independent benchmark for evaluating supplier quotes versus should-cost. Instead of asking, ‘Which supplier offers the best price?’ the question evolves to ‘Why quoted price from Supplier C is ₹20 higher than should-cost?’ and ‘Why quoted price from Supplier A is ₹5 lower than should-cost?’. And based on the answers to these questions, the buyer can make an informed decision about the purchase.
How Procurement Teams Can Use the Cost Gap
Determining the difference between the supplier’s quotation and should-cost is only the beginning. The analysis of the gap is useful in ascertaining the reason for the variance and the next steps to take.
The following steps explain how procurement teams can use the information.
7.1 Determine the Biggest Cost Variances
Procurement teams should identify first those cost elements that make the biggest contribution to the gap between the supplier quotation and the preliminary should-cost estimate. Significant variances in material, labour, process, tooling or overheads should raise the suspicion that one of these areas needs closer scrutiny
7.2 Question the Assumptions of the Quotation
Once significant variances have been identified, procurement can work through the assumptions with the supplier to establish the reasons for the variances. This may involve material prices, usage, cycle time, labour rates, tooling, overheads, and volumes.
7.3 Determine the Justified and Unjustified Gap
Not all variances are areas for improvement. Some differences may be due to technology, quality, capability, tooling, or other factors. The first objective is to understand the variance and determine which differences are justified rather than automatically treating every variance as an opportunity for cost reduction.
7.4 Use the Analysis to Strengthen Supplier Negotiations
Once the major cost variances and their underlying assumptions are understood, procurement can use the analysis to support fact-based supplier negotiations. Instead of negotiating only around the final quoted price, teams can discuss specific cost drivers and assumptions contributing to the difference.
7.5 Use the Analysis to Make Informed Decisions How the analysis can help improve sourcing decisions: The analysis helps the manufacturers to compare the offers made by the suppliers on the basis of a cost benchmark, and it can assist in identifying methods of reducing costs, as well as improving processes, developing suppliers, or finding alternate sources.
When a Higher Supplier Quote May Actually Be Justified
A supplier quote can be higher than the should-cost and still be justified. The variance can be explained by differences in manufacturing technology, quality, capacity, tooling, process, or other commercial factors.
Different Manufacturing Technology
The supplier may be using different equipment, automation, or process technology that makes a difference in manufacturing costs and/or offers benefits in other areas such as quality, capacity, or other requirements.
Higher Quality Requirements
The need for additional inspection, testing, or other quality control efforts can increase manufacturing costs.
Capacity Constraints
The supplier’s cost can be driven higher by capacity related constraints such as additional shifts, overtime, or production scheduling.
Different Tooling or Process Requirements
Tooling requirements, setup, process, or tooling life can be different than what was anticipated or used in the development of the should-cost estimate.
Commercial or Business Factors
Additional commercial or business factors such as logistics, packaging, order quantity, payment terms, or other factors can affect the supplier’s quote.
Therefore, the fact that a supplier’s price is higher than should-cost is not necessarily an opportunity for cost reduction. The goal of should-cost analysis is to understand the variances and determine whether they are justified, rather than assume that all variances are opportunities for cost reduction.
From Price Comparison to Cost-Based Negotiation
Once the buyer has identified and understood the cost drivers that caused the supplier quotation and should-cost to differ, he/she can use that information to negotiate a more favorable deal with the supplier.
This could take the form of not negotiating around the final quotation amount, but rather challenging the assumptions around certain cost elements. For instance, if it was discovered that the supplier’s material, labour, machine, or overhead assumption was higher than what the buyer had anticipated, he could challenge their position on those cost elements.
Let’s say for instance, that a supplier has quoted ₹125 where the should-cost was ₹105. Rather than asking the supplier to lower their quotation by ₹20, the buyer can dig into the reasons why the ₹20 difference exists. Perhaps it was due to the following:
Material: ₹5
Labour: ₹3
Machine/process: ₹4
Overheads: ₹3
The rest could be explained by either profit or other assumptions made by the supplier.
This will give the buyer a good insight as to what he should negotiate with the supplier. It is unlikely that he will be able to completely eliminate the ₹20 difference, but he will be able to identify which cost assumptions are reasonable, and which ones are negotiable.
For instance, if the supplier has a higher machine rate due to a completely different process requirement, it may not be possible to negotiate that difference away.
However, if the supplier was assuming a higher overhead rate due to an inefficient process, or an assumption that doesn’t reflect the buyer’s requirements, there is a good chance that the buyer can negotiate a lower overhead rate.
This removes some of the emotion out of the negotiation, where rather than saying “your price is too high”, the buyer can have a detailed conversation with the supplier around cost assumptions, and what areas can possibly be negotiated. This allows for a much more transparent supplier-buyer relationship, and allows the buyer to negotiate a more favorable price, or a better sourcing strategy for the products he buys.
How Cost It Right Helps
Cost It Right helps manufacturers bring supplier quotations, cost drivers, and should-cost analysis into a structured costing environment.
Instead of relying on spreadsheets and manually comparing supplier quotations, manufacturers can use Cost It Right to:
- Standardize Costing: Build structured cost models using consistent cost elements and manufacturing assumptions.
- Analyze Supplier Quotes: Compare supplier quotations against cost breakdowns and identify significant cost variances.
- Improve Cost Transparency: Understand the factors contributing to a supplier’s quoted price rather than evaluating only the final figure.
- Support Should-Cost Analysis: Establish cost baselines using material, labour, machine, tooling, overhead, and other relevant cost drivers.
- Strengthen Negotiations: Give procurement teams data-backed insights to question cost assumptions and negotiate from a stronger position.
- Enable Better Decisions: Use structured costing information to support supplier evaluation, sourcing, and cost optimization decisions.
By connecting cost analysis with supplier quotations and procurement decisions, Cost It Right helps manufacturers move from simply comparing prices to understanding and managing the costs behind them.
Conclusion
A supplier quotation tells a manufacturer what a supplier is asking for a component, but it does not necessarily explain whether that price reflects the underlying cost of manufacturing.
Should-cost analysis provides an independent benchmark that helps manufacturers understand the cost drivers behind supplier quotations, identify meaningful cost variances, and determine whether those differences are justified.
The objective is not simply to find the lowest quotation or force every supplier to match the should-cost. It is to understand why the prices differ, distinguish justified costs from areas that require further investigation, and use that insight to support better sourcing and negotiation decisions. When supplier quotations are evaluated alongside a structured should-cost baseline, procurement teams can move beyond simple price comparison toward greater cost transparency and more informed decision-making.
FAQs
A supplier quote is the proposed price from a supplier for manufacturing and supplying the component, whereas should-cost is an independent estimation of what it should cost considering cost drivers like material, labour, process, tooling, utilization and overheads.
It could be due to several reasons like difference in material rates, process, machine and labour rates, tooling considerations, utilisation, overheads, volumes, or commercial expectations. Essentially all these factors affect the quotation and hence two suppliers might have a different opinion about the cost of the same component.
A manufacturer can establish should-cost by understanding the relevant cost drivers for the component and estimating costs based on manufacturing and commercial assumptions. Depending on the complexity of the component, should-cost analysis can involve material, material utilization, labour, machine and process costs, tooling, overheads, wastage, and volumes.
It does not necessarily mean that the supplier is overcharging. The higher quotation could be due to specific commercial considerations or process requirements specific to that supplier. Should-cost analysis helps understand the root-cause of such variances.
Should-cost analysis provides negotiation leverage by helping the buyer understand the cost drivers for the component independently. Instead of comparing against another supplier’s quotation, the buyer can reason out with the supplier based on material, labour, process, tooling, and other costs to understand if and how the supplier’s quotation can be improved. It provides a stronger foundation for negotiations.
Costing and procurement software can be used to structure the costing process, store costing information, compare supplier quotations, identify gaps, and help analyze cost drivers for better negotiations. Such software helps with end-to-end cost management and supplier management, particularly useful for manufacturers dealing with hundreds or thousands of components and suppliers.
