Work sequence is the order in which work is performed.  The work sequence is generally made up of the best possible method of performing a task or producing a product.  Work sequences should be established with the absolute minimum amount of waste in the sequence.

  Digitization is the adoption of digital, real-time and networked products and services and related information. In real terms, digitization is about choice, efficiency, and responding to customer needs. All of this digitization requires the skills of operations managers to implement and oversee. 

Reference - Kettering University, 01/12/2017, Operations Management and Technology.

  One of the best sources to learn about the different manufacturing environments is APICS.  With more than 50 years of development and a community of professionals all over the world Apics offers fantastic educational courses in production, inventory and supply chain.  The Apics learn it app offers the following definition for the term engineer to order; Products whose customer specifications require unique engineering design, significant customization, or new purchased materials.  Each customer order results in a unique set of part numbers, bills of material, routings.

Synonym:  Design-to-order

Discussion - What types of work environments can you think of that are engineer-to-order or design-to-order environments?