You will size the fitting on the heat exchanger. You will not design the heat exchanger. By the time you show up, the motor frame is fixed, the impeller diameter is set, the pipe schedule is locked, and the vendor is chosen. You inherit an assembly that needs bolt patterns shifted, thread callouts corrected, clearance cuts added, and a torque table that nobody agrees on. You will spend a week arguing about a gasket while the thing you are gasketing was designed without you. See Reason #33. This is not a failure of ambition. It is a description of the job.
The money confirms it. The National Science Foundation tracks R&D spending by industry. In 2022, machinery manufacturing, the sector that employs more mechanical engineers than any other manufacturing subsector, spent 3.7 percent of its revenue on research and development. That is below the all-industry average of 4.9 percent, which includes retail, food service, and hospitality. Semiconductors invested at 25.8 percent. Pharmaceuticals at 16.9 percent. Computer and electronic products at 14.3 percent (NSF NCSES, 2022). In total dollars, machinery manufacturing accounts for 3 percent of all U.S. business R&D. Information and software publishing accounts for 25 percent. The industry you trained for invests less in innovation per dollar of revenue than the national average across every industry in the country. See Reason #60.
The people who study engineering services have a word for this. Bain & Company surveyed over 500 senior engineering executives in 2023 and found that companies are "outsourcing legacy disciplines that are often less strategically relevant" for manufacturers. The legacy disciplines they named: mechanical engineering, testing, simulation, and compliance. Service providers have "significantly optimized" these operations. Digital engineering, the territory of electrical and computer science, commands a dominant share of the outsourcing market and is growing at 19 percent annually, nearly double the overall rate (Bain, 2023). The consulting firms that study your field do not call it traditional. They do not call it foundational. They call it legacy. See Reason #40. Patent filings tell the same story. Electrical engineering accounts for roughly 40 percent of all international patent applications filed under the Patent Cooperation Treaty. Computer technology alone is the single largest technology field in global patenting. Mechanical engineering's share has been declining for two decades (WIPO, 2024). The innovation output of your discipline is shrinking in the one metric that measures it directly. See Reason #7.
This is not random. Economists James Utterback and William Abernathy showed in 1975 that once a product reaches a "dominant design," innovation shifts from product creation to process optimization, and engineering work becomes incremental (Utterback & Abernathy, 1975). ME's core technologies, engines, pumps, compressors, heat exchangers, bearings, gears, hydraulic circuits, reached dominant design decades ago. Some reached it centuries ago. The S-curve flattened. Semiconductor devices, software architectures, wireless protocols, and AI models are still climbing. Their engineers create new products. You maintain existing ones. Civil engineers stamp buildings under PE requirements that give them design ownership of every project. See Reason #58. Chemical engineers run processes where optimization IS the innovation, because yield improvements have direct economic value. Your optimization is a cost reduction exercise on a product someone else conceived. See Reason #42 and Reason #51. The compliance layer you manage exists to protect the architecture you did not build. See Reason #65.
You are not a custodian because you chose the wrong employer. You are a custodian because the industry reclassified your entire discipline as custodial.
References:
Bain & Company. (2023). The digital shift fuels outsourcing in engineering and R&D. https://www.bain.com/insights/the-digital-shift-fuels-outsourcing-engineering-r-and-d-report-2023/
National Center for Science and Engineering Statistics. (2022). Business Enterprise Research and Development Survey, Table 3: Sales, R&D, R&D intensity, and employment. NSF 24-334. https://ncses.nsf.gov/pubs/nsf24334
Utterback, J. M., & Abernathy, W. J. (1975). A dynamic model of process and product innovation. Omega, 3(6), 639-656. https://doi.org/10.1016/0305-0483(75)90068-7
World Intellectual Property Organization. (2024). PCT yearly review 2024: The international patent system. https://www.wipo.int/edocs/pubdocs/en/wipo-pub-901-2024-en-patent-cooperation-treaty-yearly-review-2024.pdf
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