Project Constraints, Opportunity Cost, and Trade-off Analysis

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Project Constraints, Opportunity Cost, and Trade-off Analysis

Project Management · Chapter 2: Launching and Defining a ProjectSection 2.3 · lesson 12 of 739 min · free with a free account

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In this lesson

Weighing scope, schedule, cost, quality, resources and risk against each other.

  • Explain the six project constraints and how they compare with the triple constraint
  • Calculate opportunity cost as the net value of the best alternative forgone
  • Rank constraints as fixed, flexible or optimized before pressure arrives
  • Score options with a weighted prioritization matrix and record the decision

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Transcript

Everything said in the video, section by section (1,224 words). Read along, or search it.

Opening Question

The Real Cost of Going Faster

Daniel manages the launch of a new chair line at a furniture maker. His sponsor, Renata, brings news: the launch must move two weeks earlier, to land on a trade show. Can the team go faster? Almost always, yes. So that's the wrong question. The right one is: what do we give up to go faster, and who agrees to give it up?

Definition

Six Project Constraints

Constraints are the boundaries a project must be delivered within, and they can't all be satisfied to the fullest at once. This course uses six. Scope limits how much the project delivers. Schedule limits when results must exist. Cost limits what can be spent. Quality limits how much imperfection is acceptable. Resources, the people, equipment and facilities, limit how much work can proceed at once. And risk limits how much exposure to possible loss the organization will accept. Press any one of them, and at least two others respond. A request that seems to be about one constraint is almost always about several.

Comparison

Triple Constraint Versus Six Constraints

Many introductions use only three: scope, schedule and cost, drawn as a triangle with quality in the middle. That's the triple constraint. Its strength is communication. Three are easy to remember, they're the ones sponsors negotiate most, and extra resources or risk mostly show up as cost or schedule anyway. The six-constraint view adds quality, resources and risk as separate limits. Its strength is realism. Sometimes you can cut schedule without changing cost, by adding people. Or hold scope and cost by accepting a riskier method. Folding those into three hides real choices. Whether three-constraint thinkers actually overlook risk more often is a question for evidence. How much to value simplicity is a matter of judgment. This course uses six, as a teaching choice.

Interactions

Pressure on One Constraint Moves Others

The constraints are linked, so pressure on one reappears elsewhere. Back at the furniture maker, the schedule has tightened by two weeks. The team could add weekend shifts. That raises cost, and stretches the people. They could overlap tasks, ordering materials before the design is approved. That raises risk: a late design change wastes the early order. Or they could shorten inspection, which may lower quality, and push problems onto customers. Other chains run other ways. Added scope demands time, money or people. Cutting cost trims scope or quality, or adds risk. Reducing risk costs time and money. So something will move. The questions are what, by how much, and who agreed to it.

Opportunity Cost

Value of the Best Alternative Forgone

Every choice also has an opportunity cost: the value of the best alternative you give up. It isn't the money spent. It's the benefit of the next-best use, forgone. A software team has forty thousand to spend, and room for one project. Both candidates cost forty thousand. These figures are illustrative. Project X, a customer ordering portal, should return a hundred and thirty thousand. Its net benefit: ninety thousand. Project Y, an internal reporting tool, should return a hundred and ten thousand. Net: seventy thousand. Choose X, and the opportunity cost is Y's seventy thousand. Choose Y, and it's X's ninety thousand. So X is better by twenty thousand. The forty thousand spent is the same either way. What differs is what you forgo, and that rests on benefit estimates that are themselves uncertain.

Quick Check

Opportunity Cost of Choosing P

Quick check. A team has fifty thousand, and room for one project. Project P would return a hundred and twenty thousand, and Project Q ninety-five thousand. Each costs fifty thousand. If the team chooses P, what's the opportunity cost? Pause, and work it out. Forty-five thousand: Q's net benefit, ninety-five minus fifty, is what you give up. Seventy thousand is P's own net benefit, and twenty-five thousand is the gap between them. Neither is what's forgone.

Trade-off Analysis

Fixed, Flexible and Optimized Constraints

Trade-off analysis is the structured comparison of options when improving one constraint worsens another: the choice, the options, and the constraints each one affects. Doing it explicitly prevents the commonest failure: a trade-off made by default, where pressure falls wherever resistance is lowest. The best preparation is ranking the constraints before pressure arrives. Fixed means it cannot move, like a legal deadline or a safety standard. Flexible means it may move within stated limits. Optimized means doing as well as possible, without a firm limit. If every constraint is fixed, nothing can absorb pressure, and the project will miss something unpredictably. Agree on the ranking with the sponsor at the start, and record it in the charter.

Worked Example

Scoring Three Launch Options

When several options exist, a prioritization matrix scores each against agreed criteria, with weights. A weighted score is the sum of each weight times the option's score. Weights add to one, and are agreed before scoring, so nobody can tune them toward a favorite. Scores are judgments, and the matrix structures the discussion. Daniel has three options. One: keep the full scope, and add weekend shifts. Two: launch two of the three finishes on time, and the third later. Three: shorten the safety testing. The weights: quality and safety point four, cost point two five, meeting the schedule point two, and risk point one five. Option one totals three point five five. Option two, four point zero. Option three, only two point five five. Option three meets the date perfectly, but it scores one on quality and one on risk, over half the weight. The matrix exposes a choice that looked good on one dimension only.

Quick Check

Scoring a Temporary Supplier

Quick check. A fourth option: hire a temporary supplier. It scores three on quality and safety, three on cost, five on schedule, and two on risk. Using the same weights, what's its weighted total? Pause, and work it out. Three point two five. One point two, plus point seven five, plus one point zero, plus point three. A strong schedule score can't rescue weak quality and risk scores, when those carry most of the weight.

Decision Record

Writing the Trade-off Down

Finally, write the trade-off down. A decision record states what was decided, who decided, the alternatives rejected, and why. For the chair launch: two of three finishes on the earlier date, the third after the show. Decided by Renata, on Daniel's recommendation. Rejected: weekend shifts, too costly for the value, and shorter safety testing, unacceptable on quality and risk. The ranking: safety fixed, the launch date fixed, scope and cost flexible within the approved limit. Effects accepted: visitors can't order the third finish at the show, and one supplier order is split in two. Review point: if either delivery slips by more than a week.

Case Resolution

Deciding Which Constraints Bend

Back to Daniel. His first impulse was to start rearranging the work. Instead, he changed nothing until the choice was written down. He named the constraints the change touched, and with Renata, fixed what could not move: the safety standard, and now the date. Then he scored the options, and Renata signed the record. Only then did any work change. Later, a supplier warned of a delay. Nobody argued: the review point in the record already said what would trigger a new decision. That's the answer to the opening question. You can't maximize every constraint, so decide early, and in writing, which ones bend.

Key Takeaways

Constraints, Opportunity Cost and Records

To recap. Six constraints: scope, schedule, cost, quality, resources and risk. Press one, and others move. Opportunity cost is the value of the best alternative given up, not the money spent. Rank constraints as fixed, flexible or optimized, before pressure arrives. And score options with weights agreed in advance, then record the decision.

About Project Management at UPI Study

Project Management (Business 230) is a self-paced online course of 73 video lessons in 12 chapters, from starting and defining a project to planning, budgets, scheduling tools, proposals, contracts, execution, monitoring, closure, teams and certification. It carries a NCCRS credit recommendation for 3 semester credits.

Every lesson transcript is free on pages like this one, and the videos are free with a free UPI Study account. Enrolling adds a practice quiz after each lesson, the graded work and final exam that earn the credit, lifetime access, and an official transcript on completion. UPI Study has helped over 130,000 students with college credits. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.

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Why take it here

Why students take Project Management with UPI Study

How projects are planned, run and closedProject Management teaches how to deliver work on time and on budget: scope, schedules, the critical path, budgets and earned value, risk, contracts, monitoring and closing a project, and leading the team. It is a common course in business, management and engineering degrees.
Credit at a fraction of the priceThe same 3 credits can cost $750 or more at a US college. Here it is one payment, self-paced, with lifetime access.
Finish your degree soonerTransfer credits reduce the courses you still owe, so you can graduate earlier or lighten a heavy semester.
Strengthen an applicationA completed college-level course on an official transcript shows admissions and scholarship committees you can do the work.
Study on your own scheduleNo start dates, no deadlines. Watch the lessons, practice, and take the final when you are ready.
130,000+students helped with college creditsACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.

Where the credit goes

Universities that work with NCCRS

Project Management carries a NCCRS credit recommendation. These universities work with NCCRS; some are UPI Study's signed partners. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.

Thomas Edison State UniversityThomas Edison State UniversitySigned partnerUniversity of the PeopleUniversity of the PeopleSigned partnerCharter Oak State CollegeCharter Oak State CollegeSigned partnerStrayer UniversityStrayer UniversitySigned partnerColumbia Southern UniversityColumbia Southern UniversitySigned partnerIndiana TechIndiana TechSigned partnerPenn StatePenn StateWorks with NCCRSSouthern New Hampshire UniversitySouthern New Hampshire UniversityWorks with NCCRSSUNYSUNYWorks with NCCRS +many more cooperating universitiesFind my college →

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FAQ

Questions students ask us

About Project Constraints, Opportunity Cost, and Trade-off Analysis

What is the triple constraint in project management?
The triple constraint is the view that scope, schedule and cost limit a project, often drawn as a triangle with quality in the middle. It is easy to remember and covers what sponsors negotiate most. A six-constraint view adds quality, resources and risk as separate limits, which exposes choices such as adding people to cut schedule without changing cost.
How do you calculate opportunity cost when choosing between projects?
Opportunity cost is the net benefit of the best alternative given up, not the money spent. If two projects each cost $50,000 and would return $120,000 and $95,000, choosing the first forgoes the second's net benefit of $45,000. A common mistake is quoting the chosen project's own net benefit or the gap between the two instead.
What does it mean to rank project constraints as fixed, flexible or optimized?
A fixed constraint cannot move, such as a legal deadline or safety standard. A flexible one may move within stated limits. An optimized one should be done as well as possible without a firm limit. Agreeing this ranking with the sponsor at the start, and recording it in the charter, stops pressure from landing wherever resistance is lowest.
How does a weighted prioritization matrix compare trade-off options?
A prioritization matrix scores each option against agreed criteria and sums weight times score, with weights adding to one and agreed before scoring. With weights of 0.4 quality, 0.25 cost, 0.2 schedule and 0.15 risk, scores of 3, 3, 5 and 2 total 3.25. The matrix can expose an option that looks good on schedule but fails on heavily weighted quality and risk.

About the Project Management course

How many college credits is Project Management?
Project Management (Business 230) carries a NCCRS credit recommendation for 3 semester credits. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.
How much does Project Management cost and what is included?
$250, paid once, with lifetime access: all 73 video lessons, a practice quiz after each, the graded work and final exam, and an official transcript when you finish. Students who want several courses choose UPI Study PRO instead.
Which universities accept UPI Study credits?
UPI Study has signed partner agreements with universities such as Thomas Edison State University, University of the People and Charter Oak State College, and works with universities such as Penn State, SNHU and SUNY. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities. Use "Find my college" on this page to check yours.
How long does Project Management take?
It is self-paced with no deadlines. The 73 lessons total about 15 hours of video; most students add reading and practice time and finish in a few weeks to a few months, on their own schedule.
How are the exams done?
Quizzes and assignments are online in the course. The final exam is taken online with proctoring; a person on the UPI Study team checks assignments, usually within two days.
How do my credits reach my college?
When the course shows 100% complete, request the official transcript from your dashboard. It is sent to the college you name, and you can send it to more than one. Check your college first with "Find my college" on this page, or ask Athena.

Ready for the full course? Earn 3 credits in Project Management.

73 video lessons, a quiz after each one, and the graded work that earns the credit. Recommended for credit by NCCRS.

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