{"id":902138,"date":"2026-10-09T11:08:13","date_gmt":"2026-10-09T11:08:13","guid":{"rendered":"https:\/\/revismo.com\/?p=902138"},"modified":"2026-10-09T11:08:21","modified_gmt":"2026-10-09T11:08:21","slug":"engineering-calculations-in-product-development-when-is-excel-enough-and-when-do-you-need-fea-simulation","status":"publish","type":"post","link":"https:\/\/revismo.com\/en\/engineering-calculations-in-product-development-when-is-excel-enough-and-when-do-you-need-fea-simulation\/","title":{"rendered":"Engineering Calculations in Product Development: When Is Excel Enough and When Do You Need FEA Simulation?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The purpose of engineering calculations is not simply to prove that a structure can withstand a load.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When performed at the right stage of product development, engineering calculations help engineers make better design decisions, identify critical areas, assess load-bearing capacity, and avoid both underdesign and unnecessary material consumption.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In practice, engineering calculations do not always require complex simulations. Sometimes, a straightforward calculation in Microsoft Excel provides the most useful answer. In other projects, evaluating structural behaviour may require detailed finite element analysis (FEA). The key is to select the appropriate calculation method based on the engineering problem being investigated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Revismo has over 13 years of experience in engineering calculations, structural analysis, and simulations. Our work includes developing new products and machinery, verifying existing structures, optimising designs, and solving complex engineering challenges.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><strong>What Are Engineering Calculations and Why Are They Important in Product Development?<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Engineering calculations are technical analyses used to evaluate how a product, machine, or structure behaves under different loads and operating conditions. Their purpose is to verify structural strength, stiffness, stability, reliability, and compliance with design requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In <a href=\"https:\/\/revismo.com\/en\/services\/product-development\/\">product development<\/a>, engineering calculations provide a technical basis for decision-making rather than relying solely on experience, intuition, or previously developed solutions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, engineering calculations help answer questions such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>How much load can a structure withstand?<\/li>\n\n\n\n<li>How much will a component deform under load?<\/li>\n\n\n\n<li>Could a beam, profile, or structural element buckle?<\/li>\n\n\n\n<li>Are the selected fasteners sufficiently strong?<\/li>\n\n\n\n<li>What is the structure\u2019s factor of safety?<\/li>\n\n\n\n<li>How do dynamic or repeated loads affect the design?<\/li>\n\n\n\n<li>Could the structure\u2019s natural frequency coincide with vibrations generated during operation?<\/li>\n\n\n\n<li>How do temperature, pressure, vacuum, wind, or snow affect the structure?<\/li>\n\n\n\n<li>Is the structure unnecessarily overdesigned?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Revismo has performed engineering analyses involving static and dynamic loads, positive and negative pressure, temperature effects, forces in moving systems, nonlinear behaviour, buckling, fatigue, impact and drop conditions, natural frequencies, and wind and snow loads.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The main value of engineering calculations is that they provide a <strong>technically justified basis for design decisions.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><strong>At What Stage of Product Development Should Engineering Calculations Be Performed?<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Engineering calculations should ideally begin during the early stages of product development and be repeated throughout the development process whenever necessary.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One common mistake is postponing structural calculations until the end of a project, when the CAD model and manufacturing drawings are nearly complete. At this stage, calculations may reveal problems, but correcting them can require redesigning an otherwise finished solution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The purpose and complexity of engineering calculations depend on the stage of product development.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Concept Development<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">During the initial stages of product development, relatively simple engineering calculations help compare design alternatives and assess the technical feasibility of proposed solutions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, engineers can evaluate whether the selected materials, dimensions, and structural concepts are suitable for the expected loads.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Detailed Engineering Design<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">During detailed <a href=\"https:\/\/revismo.com\/en\/services\/cad-design\/\">CAD design<\/a>, structural calculations can be used to verify specific profiles, joints, wall thicknesses, materials, and fasteners.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At this stage, modifying a design is generally easier and less expensive than making changes after manufacturing has begun.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prototyping and Manufacturing Preparation<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Before building a prototype or starting production, structural analysis can be used to evaluate the complete design and verify critical loading conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/revismo.com\/en\/services\/strength-analysis\/\">Strength calculations<\/a> help identify potential weaknesses and reduce the risk of discovering problems only during testing or actual operation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Calculations may also need to be repeated after prototype testing, changes in operating conditions, or significant design modifications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, engineering calculations should not be treated as a single verification step. They are an engineering tool used throughout product development to support decisions at different stages.ences for professional engineering software, which make up a significant share of the company\u2019s expenses.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>When Are Manual or Excel-Based Engineering Calculations Sufficient?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The term&nbsp;<em>manual calculations<\/em>&nbsp;does not necessarily mean performing calculations with pen and paper. In engineering practice, analytical calculations based on established formulas are often performed in Microsoft Excel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Excel allows engineers to modify input parameters, compare design alternatives, and document the calculation process efficiently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This approach is particularly suitable when the engineering problem can be described reliably using established formulas and simplified mathematical models.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Examples of calculations suitable for Excel include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Verifying the strength of simple structural profiles<\/li>\n\n\n\n<li>Sizing bolts and other fasteners<\/li>\n\n\n\n<li>Calculating forces and moments<\/li>\n\n\n\n<li>Performing preliminary load assessments<\/li>\n\n\n\n<li>Comparing material properties<\/li>\n\n\n\n<li>Calculating basic factors of safety<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">At Revismo, Excel-based calculations are used, among other applications, to support component selection and document project-specific engineering calculations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A simpler calculation is not necessarily less reliable than a complex simulation. When an engineering problem can be accurately described analytically, a transparent, formula-based calculation may be more appropriate than an unnecessarily complicated simulation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>When Is FEA Simulation or Finite Element Analysis Necessary?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">FEA simulation is used in structural analysis when a structure\u2019s geometry, loading conditions, or interactions between components are too complex to be reliably evaluated using simpler analytical calculations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>FEA (Finite Element Analysis)<\/strong> is based on the <strong>finite element method (FEM)<\/strong>. This numerical method divides a structure\u2019s geometry into smaller elements to calculate how the structure behaves under different loads, including the distribution of stresses and deformations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">FEA simulation is particularly useful when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperature effects on structural strength and deformation must be evaluated.<\/li>\n\n\n\n<li>The structure has complex geometry.<\/li>\n\n\n\n<li>Loads are transferred through multiple interconnected components.<\/li>\n\n\n\n<li>It is necessary to evaluate stress distribution and identify critical areas.<\/li>\n\n\n\n<li>The structure contains holes, welded joints, transitions, or other potential stress concentration areas.<\/li>\n\n\n\n<li>Contact interactions between components must be considered.<\/li>\n\n\n\n<li>Loads or material behaviour are nonlinear.<\/li>\n\n\n\n<li>Dynamic loads or natural frequencies need to be analysed.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-1\"><strong>Reliable FEA Simulation Starts With a Properly Defined Calculation Model<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Using FEA does not automatically guarantee more accurate or reliable results. <strong>A successful simulation begins with correct input data and a properly defined engineering problem.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Simulation software can produce mathematically precise results even when the underlying model does not accurately represent real operating conditions. Therefore, one of the most critical stages of finite element analysis is developing an appropriate calculation model.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Before evaluating the results, engineers must correctly define the model and its input parameters. This includes considering actual loading conditions, fasteners and contacts, material properties, and any geometric simplifications that can be made without compromising the reliability of the results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At Revismo, the structural analysis process begins with a fundamental question:\u00a0<em><strong>What do we need to determine through this calculation?<\/strong><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Only then is the calculation model prepared and simplified where appropriate. The analysis type is selected, material properties are verified, boundary conditions, contacts, and loads are defined, and the finite element mesh is generated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After the simulation, engineers assess whether the calculated deformations and reaction forces are physically reasonable. <strong>This final step is essential because a colourful stress distribution plot on a computer screen is not, by itself, a valid engineering conclusion.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-2\"><strong>Does FEA Simulation Replace Manual Structural Calculations?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">FEA simulation does not completely replace analytical structural calculations. In engineering practice, these methods complement each other and are often used together to verify the same structure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, if an FEA simulation produces a support reaction that is inconsistent with the known applied loads, the problem may lie in the model\u2019s contact definitions, constraints, or load application.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At Revismo, simplified loading scenarios and analytical calculations are used when necessary to verify calculation models and assess whether their behaviour is consistent with physical principles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, Excel-based structural calculations and FEA simulations are not competing methods. They are complementary engineering tools that can be combined to achieve more reliable technical assessments.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Problems Can Engineering Calculations Help Prevent?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Engineering calculations and <a href=\"https:\/\/revismo.com\/en\/services\/strength-analysis\/\">strength analysis<\/a> help identify potential weaknesses in a structure before manufacturing or commissioning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to assessing the risk of structural failure, calculations can reveal problems affecting product safety, reliability, and service life.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Engineering calculations can help identify issues such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Excessive deformation:<\/strong>\u00a0A structure does not fail but bends or deforms enough to interfere with its intended function.<\/li>\n\n\n\n<li><strong>Buckling:<\/strong>\u00a0A long or slender structural element loses stability before the material reaches its strength limit.<\/li>\n\n\n\n<li><strong>Material fatigue:<\/strong>\u00a0Repeated loading causes cracks or structural failure, even when individual loads remain within acceptable limits.<\/li>\n\n\n\n<li><strong>Resonance:<\/strong>\u00a0A machine\u2019s operating frequency approaches the structure\u2019s natural frequency, potentially causing excessive vibration.<\/li>\n\n\n\n<li><strong>Overloaded fasteners:<\/strong>\u00a0The main structure is sufficiently strong, but bolts, screws, or other connecting elements cannot withstand the applied loads.<\/li>\n\n\n\n<li><strong>Overdesign:<\/strong>\u00a0A structure contains more material than necessary, increasing its weight and manufacturing costs.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">During structural analysis, Revismo evaluates stresses, deformations, stability, factors of safety, and potential failure modes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Where necessary, critical areas are identified, and recommendations are made to improve the structural design.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How Can Structural Analysis Reduce Weight and Material Consumption?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An important question in product development is whether a structure needs to be as heavy and robust as originally designed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If engineering calculations show that certain areas have an unnecessarily high safety margin, there may be opportunities to optimise the structure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, structural analysis can help engineers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduce material thickness.<\/li>\n\n\n\n<li>Select smaller structural profiles.<\/li>\n\n\n\n<li>Modify structural geometry.<\/li>\n\n\n\n<li>Position reinforcements only where they are needed.<\/li>\n\n\n\n<li>Reduce material consumption.<\/li>\n\n\n\n<li>Simplify component manufacturing.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">However, structural optimisation does not always mean removing material.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An analysis may show that reducing weight in the wrong area would compromise structural performance. In such cases, modifying the geometry or repositioning stiffening elements may provide a more effective solution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Structural analysis is therefore not only a verification method but also an important tool for design <strong>optimisation.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Where appropriate, Revismo\u2019s engineering analyses include technically justified recommendations for improving structural strength, reducing weight and material consumption, or enhancing manufacturability.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Which Standards Apply to Engineering Calculations?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For certain structures, loading conditions and acceptance criteria cannot be determined solely through engineering judgement. Depending on the project, engineering calculations may need to comply with applicable legislation, technical standards, customer specifications, or other design requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Before performing engineering calculations, it is therefore essential to <strong>determine what needs to be analysed and which technical requirements apply.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Does the Client Receive as a Result of Engineering Calculations?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The value of engineering calculations should not remain solely on the engineer\u2019s computer. The standard deliverable of Revismo\u2019s structural analyses is a <strong>technical calculation report<\/strong>, which may include the following information depending on the scope of the project:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Purpose of the calculation;<\/li>\n\n\n\n<li>Input data and assumptions;<\/li>\n\n\n\n<li>Analysed loading conditions;<\/li>\n\n\n\n<li>Calculation model and methodology;<\/li>\n\n\n\n<li>Material properties used;<\/li>\n\n\n\n<li>Loads and boundary conditions;<\/li>\n\n\n\n<li>Key calculation results;<\/li>\n\n\n\n<li>Critical areas;<\/li>\n\n\n\n<li>Deformations, stresses, and factors of safety;<\/li>\n\n\n\n<li>Conclusions;<\/li>\n\n\n\n<li>Recommended modifications, if necessary.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The report provides a documented technical basis for further engineering design and makes it possible to understand <strong>what was calculated and which assumptions the conclusions were based on<\/strong>. This becomes particularly important if the product or its operating conditions are modified later.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Software Is a Tool, Not the Answer<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Revismo uses different software solutions for engineering calculations and simulations depending on the task. However, how the calculation problem is defined is more important than the choice of software.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Even the most advanced simulation software cannot independently determine how a machine is actually used, which contacts may move, the quality of a welded joint, or what loads a structure may experience under real operating conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Engineering Calculations Help Make Better Product Development Decisions<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Engineering calculations and structural analyses provide a sound technical basis for decision-making in product development. They help verify structural strength and reliability, identify critical areas, and reduce the risk of structural defects and unnecessary material consumption.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether using a simple Excel calculation or a more detailed FEA simulation, selecting the appropriate calculation method makes it possible to evaluate the performance of a design and implement necessary modifications before manufacturing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At Revismo, we help companies assess the strength of products, machines, and structures and develop technically sound solutions for both new product development and the optimisation of existing structures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Explore our <a href=\"https:\/\/revismo.com\/en\/services\/strength-analysis\/\">strength analysis<\/a> services or <a href=\"https:\/\/revismo.com\/en\/contact\/\">contact us to<\/a> discuss the engineering requirements of your project.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"473\" src=\"https:\/\/revismo.com\/wp-content\/uploads\/2026\/10\/Insenertehnilised_arvutused-1024x473.jpg\" alt=\"\" class=\"wp-image-902139\" srcset=\"https:\/\/revismo.com\/wp-content\/uploads\/2026\/10\/Insenertehnilised_arvutused-1024x473.jpg 1024w, https:\/\/revismo.com\/wp-content\/uploads\/2026\/10\/Insenertehnilised_arvutused-300x139.jpg 300w, https:\/\/revismo.com\/wp-content\/uploads\/2026\/10\/Insenertehnilised_arvutused-768x355.jpg 768w, https:\/\/revismo.com\/wp-content\/uploads\/2026\/10\/Insenertehnilised_arvutused-1536x710.jpg 1536w, https:\/\/revismo.com\/wp-content\/uploads\/2026\/10\/Insenertehnilised_arvutused.jpg 1549w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The purpose of engineering calculations is not simply to prove that a structure can withstand a load. When performed at the right stage of product development, engineering calculations help engineers make better design decisions, identify critical areas, assess load-bearing capacity, and avoid both underdesign and unnecessary material consumption. In practice, engineering calculations do not always [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":902140,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17],"tags":[],"class_list":["post-902138","post","type-post","status-publish","format-standard","has-post-thumbnail","category-media"],"acf":[],"_links":{"self":[{"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/posts\/902138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/comments?post=902138"}],"version-history":[{"count":2,"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/posts\/902138\/revisions"}],"predecessor-version":[{"id":902142,"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/posts\/902138\/revisions\/902142"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/media\/902140"}],"wp:attachment":[{"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/media?parent=902138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/categories?post=902138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revismo.com\/en\/wp-json\/wp\/v2\/tags?post=902138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}