23-Ind-A3 Facilities Planning · May 2013
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — May 2013 — 98-Ind-A3 Facilities Planning. Three-hour, closed-book exam (Casio or Sharp approved calculator only); any five of the seven questions constitute a complete paper and only the first five answered in the answer book are marked — all seven are solved below for completeness.
Reference texts: Tompkins, White, Bozer & Tanchoco, Facilities Planning (4th ed., Wiley) — facilities-planning objectives, material flow, activity relationships, layout types, material handling systems, computerized layout (CRAFT/CORELAP), and tool-crib centralization; Niebel & Freivalds, Niebel’s Methods, Standards, and Work Design (13th ed.) — assembly-line balancing (Ranked Positional Weight technique), buffer/decoupling design, and operator-paced line speed.
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
Facilities planning determines how an organization's tangible fixed assets best support achieving its business objectives — it is the discipline linking corporate strategy to the physical plant, and its objectives follow directly from that link. The primary objectives are: (1) support the organization's overall strategic vision — the facility plan is not an end in itself but the physical realization of a mission and set of business objectives, so it must be re-derived whenever strategy changes; (2) maximize return on investment (ROI) by making the most efficient use of resources — space, capital equipment, capital investment, personnel, energy and time; (3) provide for effective utilization of people, equipment, space and energy; (4) minimize the investment in capital — achieve the required capacity and service level with the smallest possible outlay in building and equipment; (5) be flexible and easily adaptable to future re-arrangement, expansion, or changing product/process/volume requirements, since a facility that cannot adapt becomes a strategic liability well before it is physically worn out; (6) provide for ease of supervision, employee safety and job satisfaction, since the plan governs the physical environment employees work in every day; (7) achieve the objectives with the minimum (or optimum) investment, i.e., the plan is judged against a cost/benefit standard, not against an unconstrained ideal layout. Underlying all of these is the recognition that facilities planning is not a one-time event: because product mix, volumes and processes change continuously, the plan must be revisited on a recurring planning horizon (commonly reviewed every 3–5 years, though this varies by industry).
A material handling plan must support the manufacturing and distribution mission of the facility, not merely move material from point A to point B, so its development starts with the same strategic questions the overall facilities plan starts with, then narrows to handling-system specifics. The important questions that must be resolved are:
What is being moved? The physical, chemical and value characteristics of the material (size, weight, shape, fragility, hazard classification, unit load potential) determine which handling principles even apply.
Where and when does it need to move? The origin–destination pattern (the from–to flow), the required frequency, and the timing/scheduling constraints (just-in-time delivery, batch staging, etc.) that the handling system must satisfy.
How should it move? The handling method and equipment consistent with the unit-load principle (move the largest practical load per handling operation), including whether handling should be mechanized/automated versus manual, and whether unitization (pallets, totes, containers) reduces the number of discrete handling operations.
Who or what moves it, and under whose control? Whether handling is integrated with production equipment (in-line conveyors, robotic transfer) or performed by a separate handling fleet (forklifts, AGVs), and how that handling activity is scheduled, dispatched and controlled.
How does the handling system interact with the facility layout? Material handling and layout are two faces of the same problem — the handling system must fit the space, aisle and building-structure constraints the layout provides, and the layout itself should be designed around minimizing handling (the space-and-flow relationship).
What does it cost, and what is the required service level? Handling adds cost without adding value (it is muda, non-value-added activity), so the plan must justify equipment and labour investment against the required throughput, damage rate and delivery-time performance, and must remain flexible enough to absorb changes in volume/product mix without a full system redesign.
How is the plan integrated end to end? Because manufacturing and distribution are both served by the SAME material handling plan, the questions above must be answered for the complete flow — receiving through to shipping — not independently for each department, so that handling equipment and unit loads are compatible from one end of the flow to the other.
Because a facility represents a large, largely irreversible capital investment with a multi-year (often multi-decade) useful life, the strategic facilities plan must anticipate issues whose effects will only become apparent well after the facility is built. These include:
Product and market changes. New product introductions, product-line discontinuations, and shifting demand mix change the required process routings and capacities; a plan sized only for today's product mix has no long-range life.
Demand volume and growth uncertainty. Forecast error compounds over a multi-year horizon; the plan must build in expansion capability (extra land, structural capacity for a future mezzanine, oversized utility risers) rather than a layout optimized tightly for a single forecast point.
Technology change. New production processes, automation and material handling technology can obsolete an otherwise sound layout; the plan should avoid over-committing to a single generation of process technology where the industry's technology cycle is short.
Location and site factors. Labour market availability and cost, transportation infrastructure, utility capacity, proximity to suppliers/customers, taxation and incentive structures, and community/regulatory environment all evolve over the facility's life and were fixed (or very costly to change) at siting.
Organizational and strategic changes. Mergers, acquisitions, divestitures, and changes in corporate manufacturing strategy (e.g., a shift from make-to-stock to make-to-order, or vertical integration/disintegration decisions) can each invalidate the assumptions the plan was built on.
Regulatory, environmental and safety requirements. Building codes, environmental legislation, and occupational health and safety requirements (in the Canadian context: provincial OH&S Acts, WHMIS, environmental permitting) change over time and the facility must remain compliant across its life, not merely at commissioning.
Economic and financial factors. Cost of capital, energy prices and currency exposure (for facilities serving export or import supply chains) affect the ongoing economics of a location and process choice made at the planning stage.
Because these issues cannot be forecast with certainty, the practical response embedded in good strategic facilities planning is to build in flexibility and modularity — standardized bay spacing, expandable utilities, generic (rather than hyper-specialized) space — so the facility can absorb a reasonable range of these long-range changes without a costly rebuild.
