"designed on purpose" is correct and usable in written English.
You can use it when something has been intentionally made for a specific purpose. For example, "This device was designed on purpose to help those with hearing impairments."
In order to explore the beliefs about the causes of obesity, one questionnaire designed on purpose were applied to a sample of 142 students of second and third grades of secondary school (71 Spaniard and 71 Mexican), with ages between 13 and 16 years (M = 14.02, SD = .846).846
Maybe we could have an immigration system that looked as if it were designed on purpose, not embraced in a fit of absence of mind.
The survey was designed on purpose to be short and clear to encourage the students to fill it out.
Also, the inability to change the layout was designed on purpose for providing a uniform experience when working with the program and GSDSs.
HARP at the CERN PS was the first hadron production experiment designed on purpose to match all these requirements.
Some lightweight robot platforms and devices designed on purpose include safety properties using redundant sensors or intrinsic safety design (e.g. compliance and backdrivability, limited exchange of energy).
This work suggests that while multi-functionality may be difficult to design on purpose, it may be difficult to avoid by chance, and may be a property that emerges increasing frequently as synthetic networks become larger and more complex.
As indicated in the 'Focus' row in Table 2, successful joined up initiatives are designed on both the purpose (what they hope to achieve) and the context (the system in which change has to occur, including structures, values and norms).
Economists who study public finance have long agreed with William E. Simon, the former Treasury secretary, who said that "the nation should have a tax system that looks like someone designed it on purpose".
These manipulators are designed on the basis of two purposes: (i) increasing the workspace area, and (ii) reducing the chance of interference since the three independent kinematic chains not only cause interference among the mechanical components but also reduce the workspace, which are the major challenges for parallel manipulators.
