Full Custom – sometimes the only solution

Maestro is again a ground-up Yii-based application, and has been merged with the previously separately developed SCC dataset in a single Maestro repo.

Recent explorations of OpenERP (now Odoo), Tryton and ERPNext provided useful insights into user interface and implementation alternatives. However all were found missing fundamental relationships critical for Maestro, such as issues to parts, issues to stock items, stock items to projects, and general management of serialized stock items. Further, although these “high-level frameworks” have many advantages, the time and effort required to become useful developing with them was found to be not insignificant. Finally it was deemed more efficient to scale back requirements in return for more immediate progress towards a minimum viable product.

A new demo system has been created on swiftconstructioncompany.net. The code currently running is from early 2014 (before development was halted to investigate OpenERP, Tryton and ERPNext), but will be updated after overhauling the database schema. When the demo is complete, it will include a local email server with webmail client for viewing user mail, and an LDAP server for user authentication.

A virtual machine will also be made available for download if there is enough interest (please indicate interest using the contact form).

Maestro Dev Review

I posted recently that Maestro development was moving from the Tryton framework to ERPNext.

There two perspectives to keep in mind when managing a project. The first is a crisp motivating vision of the goal, the second is the path to goal. The challenge is finding the path that best balances cost, time and quality, taking into account technical and operational risks and constraints. Oh, and did I also say the path needs to changes as new information becomes known, risks become better understood, new skills are learned, team members come and go…

Also, periodically review the individual steps on the path. Are the risks acceptable? Should a step be simplified or re-factored? Are there appropriate contingencies available? Backcasting can also be a useful technique, working backwards from the goal to the current position (Harry Tucker has a great backcasting visual).

Getting back to the Maestro project…

Maestro Platform Iterations

Maestro is now in its fourth platform iteration:

  • Platform 1 – Loosely coupled web apps (WebERP, MantisBT, OpenDocMan)
  • Platform 2 – Full-custom monolithic web app (Yii Framework)
  • Platform 3 – ERP framework (Tryton) with Integrated web apps apps (MantisBT, OpenDocMan)
  • Platform 4 – Single ERP web app (ERPNext)

Platform 1

Platform 1 was a loose integration of three separate web applications. Each application had integration points to the others as appropriate, such as from an Item in WebERP to the control documents for it in OpenDocMan, or from an Issue in Mantis to the Item in WebERP, or related documents in OpenDocMan.

|-- WebERP
|-- OpenDocMan (document control)
|-- Mantis (issue management)
\-- Launch portal (simple HTML page)

Development moved to Platform 2 after the initial prototype showed the effort to understand the underlying architectures, data structures, and different coding styles of each application, and to create an overall cohesiveness, would be greater than the effort saved by using separate applications in the first place.

Platform 2

Platform 2 was a full custom web application based on the Yii Framework. A prototype was completed with a rudimentary Parts module (including CSV and PDF export) and Order module, but development moved to Platfrom 3 in March 2014 after departure of a key team member. 

Platform 3

Platform 3 was a throwback to Platform 1 (a collection of loosely coupled applications), but with the Tryton framework (including native desktop client) replacing webERP, and WordPress replacing OpenDocMan. OpenLDAP provided a single point of user management and authentication, a self-contained messaging system was provided with Postfix, Dovecote and SquirrelMail, and WordPress provided a launch portal and document control system.

Maestro development moved away from Tryton in September 2014 after the completed prototype showed the need for both core development as well as a simplified domain-specific web-based user interface, and doing both was  beyond the ability of the project team.

|-- Tryton
|-- Desktop Portal (WordPress)
|   |-- Notices (posts)
|   |-- User Manual (pages)
|   \-- Documents (WP Document Revisions)
|-- Issues (Mantis)
|-- Messages (SquirrelMail)
\-- Users (phpLDAPadmin)

Platform 4

In the same way as Platform 3 was a throw-back to Platform 1, Platform 4 is a throw-back to Platform 2 – a single integrated web application. However, instead of a green-field development, Platform 4 is based on ERPNext.

After development moved away from Platform 2, but before starting Platform 3, two web-based ERP systems were evaluated – ERPNext and OpenERP/Odoo. Although both showed promise, Odoo had a significant learning curve for core development that would be needed, and ERPNext was still relatively young and immature. However, over the course of Platform 3 development, ERPNext made such significant progress that it became feasible to use for Platform 4.

Maestro Moving to ERPNext

Maestro development has moved from Tryton to ERPNext. The Maestro demo site will be updated shortly.

Change History


  • Tryton authenticates users using a local OpenLDAP server
  • All Bills-of-Materials implemented
  • All product documents attached to products and variants


  • Includes all SCC users and products (no Bills of Materials)

Maestro-Tryton in Closed-Alpha

I have written before about the Tryton framework. dalescott.net now includes a Tryton server and an “scc” database for implementing Maestro with Tryton – or Maestro-Tryton.

Maestro-Tryton is in Closed-Alpha, and will publicly available when all basic SCC master data has been included – Users, Products, Bills-of-Materials (BOMs), Suppliers, Customers and Projects.

If you are interested in collaborating on the Maestro project, please leave a comment and I’ll contact you. You can access the Maestro project on GitHub to access the source data, read the Maestro project wiki, and submit wiki articles, updates, issues and other work to the project.