The ISE&PPOOA profile for Cameo Systems Modeler tool (2024) enables the construction of system functional architectures that respect parent-child relationships between functions and their child functions (or sub-functions), as well as the out-in dependencies between functions themselves. 
The profile makes extensive use of the N-squared diagram, which serves as the core of the model, as we are emulating the traditional functional analysis approach and now using MBSE and SysML v1 notation. 

Here is the link to a tutorial describing how to install and use the ISE&PPOOA profile:  ISE&PPOOA Profile for Cameo System Modeler  Tutorial for Installation and Usage

• An Introduction to the ISE & PPOOA approach. Webinar presented at INCOSE UK. April 9, 2020. https://youtu.be/UVOLHBn8l90?si=1w58OLDKyIrbdhy4
• Functional Architecture Made Simple with ISE&PPOOA MBSE Methodology . Webinar presented at INCOSE GfSE June 9, 2021. https://youtu.be/OdDOaNfiabk?si=xvXnyyBDxgT3CHlu
• Bridging the gap between the system and software architectures. Webinar presented at INCOSE Chesapeake September 21,2022. https://youtu.be/psCxOT_kDQ8?si=d96BuR18CuhNRymq
• Ingeniería de Sistemas Basada en Modelos con la metodología ISE&PPOOA. Webinar in Spanish presented at INCOSE LATAM  November 7, 2023. https://youtu.be/njsEQxCLIHU?si=FOUjskEW2tGXqUFhThe N Squared chart and its 
• The N-Squared chart and its ISE&PPOOA implementation in Cameo MBSE tool. Short video at Youtube channel, March 2025. https://youtu.be/QDdwpwqfMMo?si=TW7ui2-rm2cPWdg5
• From the N-Squared chart to the functional flow. Short video at Youtube channel, May 2025. https://youtu.be/K64k-BdBc4A?si=NJma63zGqB4DmQGA
• Model Structure of the system using ISE&PPOOA MBSE methodology. Short video at Youtube channel, March 2026. https://youtu.be/ntEtCDpRo1A?si=YFA-E3Ua4Z1GKmer
• ISE&PPOOA: A functions and requirements driven MBSE methodology. Webinar presented at INCOSE Portugal (SÍNTESE) June 19, 2026. Link to recording and slides: https://archive.org/details/si-ntese-meeting-202606-ise-ppooa

>Fernandez, J.L. and Moreno, G. (2016), “MBSE for Engineering Students.” INCOSE International Symposium, Vol 26, Is 1. Edinburgh, 18-21 July 2016. http://dx.doi.org/10.1002/j.2334-5837.2016.00223.x

>Hernandez, Carlos and Fernandez-Sanchez, Jose Luis. (2017),“Model-Based Systems Engineering to Design Collaborative Robotics Applications."2017 IEEE International Symposium on Systems Engineering (ISSE) Proceedings. Vienna (Austria). October 11-13.https://doi.org/10.1109/SysEng.2017.8088258

>Fernandez Sanchez, J.L. and Nicolas Serrano, D.(2018),“Ingeniería de sistemas y eficiencia energética. El caso de un proceso de pasteurización."ieNeR´18, I Congreso Ingeniería Energética, 27 y 28 de Junio de 2018, Madrid (España). https://www.academia.edu/36953611/Ingenier%C3%ADa_de_sistemas_y_eficiencia_energ%C3%A9tica

_El_caso_de_un_proceso_de_pasteurizaci%C3%B3n

>Garcia, A and J.L. Fernandez. (2021),“A Practical Example of the Process to Define a System Functional Architecture." PPI SyEN 98 -24 February 2021.https://www.ppi-int.com/syen-newsjournal/ppi-syen-98/

>Fernandez, J.L., Martinez, J.A. and E. Diez-Jimenez. (2021),“Modeling the Mission Dimension. The Case of an Intravascular Medical Device.” PPI SyEN, issue 100, April 2021.https://www.ppi-int.com/wp-content/uploads/2021/04/PPI-SyEN-100-1.pdf

>Fernandez, J.L. and Martinez J.A. (2021).“Applying Heuristics to Model the System Physical Architecture.” PPI SyEN issue 103, August 2021 https://issuu.com/ppisyen/docs/ppi_syen_103_aug_2021/s/13114644

>Martínez-Rojas, JA, Fernández-Sánchez, JL. (2023)."Combining dimensional analysis with model based systems engineering." Systems Engineering, 26: 71- 87 https://doi.org/10.1002/sys.21646

>Martinez-Rojas, J.A.; Fernandez-Sanchez, J.L.; Fernandez-Munoz, M.; Sanchez-Montero, R.; Lopez-Espi, P.L.; Diez-Jimenez, E.; (2023). "Model-based systems engineering approach to the study of electromagnetic interference and compatibility in wireless powered microelectromechanical systems." Systems Engineering, 2023, 1-14.https://incose.onlinelibrary.wiley.com/doi/10.1002/sys.21733

> Garcia A. and Fernandez J.L. (2025). White paper:  "ISE&PPOOA and ISO 15288:2023." 3 September 2025.  /images/document/18910437/ISEPPOOAvsISO15288_whitepapersept2025-z66U6qZN0RimIRsK34dR7g.pdf

>Fernandez, Jose L.(1998), ”An Architectural Style for Object-Oriented Real-Time Systems." 5th International Conference on Software Reuse.Victoria (Canada). IEEE 1998.http://ieeexplore.ieee.org/document/685753/

>Fernandez, Jose L and Mason, Will. (2002), “A Process for Architecting Real-Time Systems." 15 th International Conference on Software and Systems Engineering (ICSSEA), Paris,France. December 2002. https://www.researchgate.net/publication/239753313_A_Process_for_Architecting_Real-Time_Systems

>Fernandez, Jose L. and Martinez, Juan C. (2003), “Implementing A Real Time Architecting Method in a Commercial CASE Tool." 16 th International Conference on Software and Systems Engineering (ICSSEA), Paris,France. December 2003.https://www.academia.edu/56888180/Implementing_a_Real_Time_Architecting_Method_in_a_Commercial_CASE_Tool

>Fernandez, Jose L and Esteban, Eduardo.(2005), “Supporting Functional Allocation in Component-Based Architectures.” 18 th International Conference on Software and Systems Engineering (ICSSEA), Paris,France. December 2005. https://www.researchgate.net/publication/257827007_Supporting_Functional_Allocation_in_Component-Based_Architectures

>Monzon, Antonio and Fernandez, Jose L. (2009), “Deadlock Risk Assessment in Architectural Models of Real-Time Systems." IEEE Computer Society Press : Industrial Embedded Systems (SIES 2009). IEEE Symposium on Industrial Embedded Systems 2009. Lausanne, Switzerland July 8 - 10, 2009. IEEE Computer Society Press, 2009, P. 181-190.http://ieeexplore.ieee.org/document/5196214/