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tell the world that you can apply, analyze & evaluate with DDOM and DDS&OP principles

The Demand Driven Leader Professional (DDLP)™ is a professional endorsement certification offered by the Demand Driven Institute, the global authority for Demand Driven education, training, certification and compliance.  The DDLP™ demonstrates that an individual can apply the concepts of the Demand Driven Operating Model, analyze and evaluate an environment according to the principles of the Demand Driven Operating Model and the tactical components of Demand Driven S&OP.  An individual achieves DDLP™ endorsement by successfully completing a rigorous test.  Upon successful completion of the test an endorsement certificate will be issued and the individual may begin using “DDLP” in their professional title.  The individual will also be issued an electronic certificate and badge for use with their social media profiles.


As a long time APICS Member who is CPIM and CSCP certified and also teaches CPIM certification classes, I am no stranger to tests, self study and online learning systems.  I have to say that the DDLP exam was one of the best practical application exams I have ever taken.  The whole idea of having spreadsheets ready to be used and reference materials readily available really does simulate real life where you would apply your knowledge to develop real life solutions in my opinion.  I also very much enjoyed the online classes and the practice exam.  Well done Demand Driven Institute.

Mark Latam, DDLP, CPIM, CSCP

testing Instructions

When you are ready to test follow the detailed instructions below to access the exam.  Allow yourself a few minutes to work through this process and the exam is available immediately after completing the registration process.  You do NOT need to schedule a time and day.  The exam is available on demand.

All exams can be accessed by clicking on the desired language button above.

Allow yourself a few minutes to work through this process and the exam is available immediately after completing the registration process.  You do NOT need to schedule a time and day.  The exam is available on demand.  

  1. Obtain a Prolydian user account.  Fill in all field marked with *  NOTE:  Your email is your user ID.  If you already have a Prolydian account simply log-in.

  2. All exams are charged in USD.  

  3. Fill in all fields marked with *. 

  4. If you have a coupon code enter the code provided in the box.  Click “Continue”

  5. You can now print a receipt for the exam or launch the exam. 

  6. Click “Start”. Please note, you do not have to immediately start your test.  Once registration and payment process is complete you can log back in at anytime to start your exam.

Testing Instructions

Exam preparation

Individuals can prepare for the Demand Driven Planner Professional (DDLP)™ test through four avenues:

  1. ATTEND a Demand Driven Leader (DDL)™ Program – the official DDLP™ test prep session.  The Demand Driven Leader (DDL)™ program equips senior and mid-level operations and supply chain managers with the ability to design, implement and sustain a Demand Driven Operating Model including parameter settings through Demand Driven S&OP (DDS&OP).  Designed by the leading authorities on Demand Driven methods at the Demand Driven Institute, the Demand Driven Leader™ program is comprised of 7 modules of in-depth Demand Driven education.

  2. TAKE - the sample test and watch the video on how to solve the problems to get the right answers on the sample exam.  To gain access to this feature you must have attended the Demand Driven Leader (DDL)™ Program.  Request DDL content access.

  3. WATCH the latest recorded version of the Demand Driven Leader (DDL)™ Program.  If you have attended a previous live or online DDL Program you can access the recording for free.  Request DDL content access.

  4. SELF STUDY – Individuals can self-study through a number of resources before attempting the test.  Appropriate resources include:

Exam Preparation
Exam Information and Content

eXam information & Content

The DDLP™ test is built on the more advanced stages of Bloom’s Taxonomy - Apply, Analyze and Evaluate.  The test taker is given 180 minutes (3 hours) to answer 50 questions multiple choice questions selected from the item bank related to specific given scenarios and the below categories.

The DDLP Test has four categories.  Each category has a number of subcategories that questions will be assigned to:

1. Demand Driven MRP

  • Decoupling Point Positioning

  • Decoupling Point Protection

  • Supply Order Generation

2. Demand Driven Scheduling

  • Control Point Placement

  • Control Point Scheduling

3. Demand Driven Execution

  • Stock Buffers

  • Time Buffers

  • Capacity Buffers

4. Demand Driven S&OP

  • DDOM Analytics

  • DDOM Projections

  • Financial Analyses

NOTE: At the beginning of the exam the test taker will be given four scenarios to study.  The test taker should study these scenarios carefully and model capacities, buffers and system potential before advancing to the first questions.  Questions for each scenario will be "clustered" for continuity.

The DDLP™ test is an open book test – notes and references can be used.  We encourage you to have a spreadsheet program ready – it may make some calculations/series of calculations easier to manage.  A calculator feature is included in the testing mechanism.


The test is offered through our testing partner Prolydian.  The testing center relies on the most advanced online testing technology utilized by nearly one thousand organizations around the world across a range of sectors including, business, government, higher education and certification and credentialing bodies.  As the testing center is available 24 hours a day, seven days per week an individual can take the exam at a time and place that is convenient for them.

The test fee is $250 (USD)

Languages Available: English, Spanish, French, Italian

Upon successful completion you will receive an email that contains information about obtaining your electronic badge and certificate.  Please read the email carefully. 


Visit our Endorsement Badge page for more information about electronic badges.

About the DDLP Badge & Certification

DDLP Badge & Certificate

Frequently Asked Questions

  1. Is the exam proctored? No, the exam is at a level that proctoring is essentially useless.  You will be asked to agree to a statement before starting the exam regarding sharing any insight and information you gain during the test.

  2. What if I fail my first attempt?  If you fail your first attempt at the test you get a second attempt for free, however, you must wait seven days to test again.  You will receive an email with a breakdown of your performance by section.  YOU MUST OBTAIN A NEW coupon code from DDI Admin to use for your second attempt.  To obtain that second code, you must email DDI Admin for a secondary code.

  3. Can I use resources during the test?  Yes.  The test is open book.  We would also encourage you to have a spreadsheet program ready – it may make some calculations/series of calculations easier to manage.  A calculator feature is included in the testing mechanism.

  4. What if I lose connectivity during the test? If connectivity is lost during the exam, please attempt to log back into the exam as soon as it is restored. You may be able to complete the exam. You can also contact DDI at

Frequently Asked Questions

DDLP™ Certificate Maintenance

DDLP™ certificate holders are required to have 20 Continuing Education Units (CEU) every five years in order to maintain their endorsement.  Each CEU is equivalent to 1 hour of “qualified content”.  A list of qualified content is included below:

  • Attendance of DDI produced webinars

  • Watching available videos on the DDI website

  • Watching available videos through DDI’s ondemand system

  • Watching the latest recording of the Demand Driven Leader (DDL)™ Program

  • Attendance of a Demand Driven World™ Conference

  • Attendance of other DDI educational products (Demand Driven Leader™, Adaptive Enterprise Foundations™, Precisely Wrong Workshop™, etc.)

  • Attendance of DDI Affiliates and event partners (look for the DDLP™ CEU Qualified Content logo)

  • Attendance of other qualified offerings (look for the DDLP™ CEU Qualified Content logo)

  • Subsequent achievement of AEFP™, DDPP™, ASTP™, DDSCP™ professional endorsement – 10 points

An application for endorsement maintenance must be filled out and submitted to DDI.  A list of qualified content must be itemized as per the application form and signed by the applicant.

Download the endorsement maintenance application

Submit your maintenance application via email

DDLP Certificate Maintenance

Demand Driven Leader (DDL) and Demand Driven Leader Professional (DDLP) are trademarks of the Demand Driven Institute.

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