This case raises the issue of the application and constitutionality of G. L. c. 260, § 2B,
2
a statute that places a time limit on the liability of architects and contractors. General Laws c. 260, § 2B, is not a statute of limitations but a statute of repose. A statute of limitations normally governs the time within which legal proceedings must be commenced after the cause of action accrues. See, e.g.,
Franklin
v.
Albert,
*703 Since G. L. c. 260, § 2B, abolishes a cause of action in tort, the following issues arise: (1) whether G. L. c. 260, § 2B, may be applied to work completed prior to its effective date, and if so, whether the application of G. L. c. 260, § 2B, in those circumstances violates the due process guarantees of the United States or Massachusetts Constitutions; (2) whether, on its face, G. L. c. 260, § 2B, violates the equal protection and due process guarantees of the Federal or State Constitutions and the right to a remedy by recourse to the laws guaranteed by the Massachusetts Constitution; and (3) whether G. L. c. 260, § 2B, may bar a claim alleging breach of express or implied warranties.
We hold that the Legislature intended that G. L. c. 260, § 2B, apply to claims involving work completed before the statute took effect. We also believe that the application of G. L. c. 260, § 2B, in these circumstances is consistent with the due process guarantees of the Massachusetts and United States Constitutions. In addition, we think that, on its face, G. L. c. 260, § 2B, does not violate the due process and equal protection guarantees of the State and Federal Constitutions and the right to a remedy by recourse to the laws guaranteed by the Massachusetts Constitution. Finally, we conclude that G. L. c. 260, § 2B, bars the plaintiff’s warranty claims, because in this case, the elements of these claims are identical to this claim of negligence.
We summarize the facts. In February, 1963, the defendant Eduardo F. Catalano agreed to design a student center on the Massachusetts Institute of Technology (M.I.T.) campus. Catalano completed and delivered all design drawings and other documents in July, 1963. By October, 1965, M.I.T. *704 accepted and occupied the building. After September, 1967, Catalano did not perform any additional services in connection with the student center. In July, 1968, the Legislature enacted G. L. c. 260, § 2B, as appearing in St. 1968, c. 612, to be effective October, 1968.
The plaintiff, Gary Klein, claims that he was injured on April 23,1976, while leaving the Harvard Cooperative Society “Tech Coop” located in the student center. The injuries allegedly occurred when the outer door struck him and caused the plate glass panels of the door to shatter. The glass allegedly cut and damaged the nerves in his hand.
In February, 1979, the plaintiff commenced this action against Catalano individually and Eduardo F. Catalano Architects and Engineers, Inc. (Architects and Engineers), claiming negligence on the part of both Catalano and Architects and Engineers, and breach of express and implied warranties by Architects and Engineers. Prior to trial, the defendants filed motions for summary judgment claiming that G. L. c. 260, § 2B, barred the plaintiff’s claims.
4
See Mass. R. Civ. P. 56 (b),
1. Application of G. L. c. 260, § 2B, to torts arising out of work in connection with improvements to real property completed prior to the statute’s effective date.
a. Statutory argument. The plaintiff claims that the judge erred in granting the defendants’ motions for summary judgment, because the Legislature did not intend that *705 G. L. c. 260, § 2B, apply to work in connection with improvements to real property completed prior to the statute’s effective date. We disagree.
Elementary rules of statutory construction require us to look to the statutory language itself as the principal source of insight into the legislative purpose.
Hoffman
v.
Howmedica, Inc.,
General Laws c. 260, § 2B, as amended by St. 1973, c. 777, § 2, provides that “[ajctions of tort for damages arising out of any deficiency or neglect in the design, planning, construction or general administration of an improvement to real property shall be commenced only within three years next after the cause of action accrues; provided, however, that in no event shall such actions be commenced more than six years after the performance or furnishing of such design, planning, construction or general administration.” The statute does not depend on the date of the improvement to real property but depends on the time the design, planning, construction, or general administration of the improvement to real property was furnished. We hold that G. L. c. 260, § 2B, applies to this action, although the defendants completed their work before the statute took effect.
b. Constitutional argument.. The plaintiff claims that the judge erred in granting the defendants’ motions for summary judgment, because application of the statute to work completed prior to the statute’s effective date violates the due process guarantees of the United States and Massachusetts Constitutions. In making this argument, the plaintiff assumes that the application of G. L. c. 260, § 2B, in those circumstances is retroactive. We do not agree with the plaintiff’s assumption that the application of the statute is retroactive.
“It is only where vested substantive rights of the parties have been adversely affected that we can say a statute oper
*706
ates retroactively, and it is only then that we need analyze the nature of the governmental interest involved in order to determine whether the statute, as applied, violates due process.”
McCarthy
v.
Sheriff of Suffolk County,
In this case, the plaintiff’s cause of action accrued when he was injured on April 23, 1976, almost eight years after the statute’s effective date. Thus, any application of the statute in this case does not adversely affect any vested substantive rights of the plaintiff. The application of G. L. c. 260, § 2B, in these circumstances does not violate the due process guarantees of the United States and Massachusetts Constitutions.
2. Facial Validity of G. L. c. 260, § 2B.
The plaintiff claims that the judge erred in granting the defendants’ motions for summary judgment because G. L. c. 260, § 2B, violates the due process and equal protection guarantees of the United States and Massachusetts Constitutions and the right to a remedy by recourse to the laws guaranteed by the Massachusetts Constitution. 5 We disagree.
a.
Standard of review.
We note at the outset that the plaintiff has a “heavy burden in seeking to overcome the statute’s presumption of constitutionality. See
El Paso
v.
Simmons,
b.
Due process.
The due process clause of the Fourteenth Amendment to the United States Constitution demands that a statute that regulates economic activity “bear a ‘reasonable relation to a permissible legislative objective.’
Pinnick
v.
Cleary,
General Laws c. 260, § 2B, was enacted in response to case law abolishing the rule that once an architect or builder had completed his work and it had been accepted by the owner, absent privity with the owner, there was no liability as a matter of law.
7
See
Inman
v.
Binghamton Hous. Auth.,
Limiting the duration of liability is a well recognized public purpose.
10
“There comes a time when [a defendant] ought to be secure in his reasonable expectation that the slate has been wiped clean of ancient obligations, and he ought not to be called on to resist a claim ‘when evidence has been lost, memories have faded, and witnesses have disappeared.’”
Rosenberg
v.
North Bergen,
General Laws c. 260, § 2B, places a limit on the liability of those involved in design and construction. In establishing the six-year limit, the Legislature struck what it considered to be a reasonable balance between the public’s right to a remedy and the need to place an outer limit on the tort liability of those involved in construction.
12
The Legisla
*711
ture could reasonably have concluded that a period of six years allows sufficient time for the most meritorious claims to accrue.
13
O’Brien
v.
Hazelet & Erdal,
The plaintiff also claims that G. L. c. 260, § 2B, violates the due process guarantees of the United States and Massachusetts Constitutions and the right to a remedy by recourse to the laws guaranteed by the Massachusetts Constitution, because it abolishes his cause of action without providing a substitute remedy.
We agree with the plaintiff that G. L. c. 260, § 2B, does abolish his cause of action against these defendants without providing an alternative remedy. See note 3,
supra.
Since his injury occurred more than six years after the defendants completed their work, the plaintiff is barred from commencing an action to recover for injuries received as a consequence of design, planning, construction or general admin
*712
istration of an improvement to real property. Nevertheless, we believe that G. L. c. 260, § 2B, is constitutional.
15
The United States Constitution allows the Legislature to abolish causes of action once recognized by the common law to further permissible legislative objectives.
Silver
v.
Silver,
Further, G. L. c. 260, § 2B, does not violate the right to a remedy by recourse to the laws guaranteed by the Massachusetts Constitution. “Societal conditions occasionally require the law to change in a way that denies a plaintiff a cause of action available in an earlier day. . . . This court
*713
would encroach upon the Legislature’s ability to guide the development of the law if we invalidated legislation simply because the rule enacted by the Legislature rejects some cause of action currently preferred by the courts. To do so would be to place certain rules of the ‘common law’ and certain non-constitutional decisions of the courts above all change except by constitutional amendment. Such a result would offend our notion of the checks and balances between the various branches of government, and the flexibility required for the healthy growth of the law.”
Freezer Storage, Inc.
v.
Armstrong Cork Co.,
In upholding G. L. c. 260, § 2B, we realize that in some cases this statute may impose great hardship on a plaintiff who has suffered injury and has a meritorious claim. However, “arguments as to hardship . . . [are] appropriate respecting the enactment of legislation. They are not controlling in the interpretation of existing statutes.”
Eastern Mass. St. Ry.
v.
Trustees of Eastern Mass. St. Ry.,
c. Equal protection. The plaintiff claims that G. L. c. 260, § 2B, violates the equal protection guarantees of the United States and Massachusetts Constitutions, because it applies only to actions alleging deficiencies in design, planning, construction or general administration of improvements to real property. The plaintiff argues that G. L. c. 260, § 2B, is similar to statutes in other States which grant immunity from suit only to architects, engineers, and contractors and which deny protection to suppliers, owners, tenants, and others in control or possession at the time the defect caused the injury. Thus, the plaintiff asserts that G. L. c. 260, § 2B, creates an unreasonable and arbitrary classification scheme which results in disparate treatment for similarly situated individuals.
In making this argument, the plaintiff does not claim that G. L. c. 260, § 2B, violates his own right to the equal protection of the laws. Thus the plaintiff lacks standing in his *714 own right to argue that G. L. c. 260, § 2B, deprives materialmen, owners, tenants and others in control or possession, of equal protection.
We recognize that, as a rule, a plaintiff who lacks individual standing may not assert the rights of others not before the court.
See Barrows
v.
Jackson,
Having determined that the plaintiff has standing, we proceed to determine whether G. L. c. 260, § 2B, violates
*715
the equal protection guarantees of the United States or Massachusetts Constitutions. “Under the equal protection clause, in the absence of a suspect classification, our role remains ‘limited to determining whether the classification involved rationally “furthers a legitimate State interest.”’”
Blue Hills Cemetery, Inc.
v.
Board of Registration in Embalming ir Funeral Directing,
We agree with the plaintiff that G. L. c. 260, § 2B, has the effect of granting immunity from suit only to architects, engineers, contractors, and others involved in the design, planning, construction, or general administration of improvements to real property and of denying that protection to suppliers, owners, tenants, and others in possession or control. Nevertheless, the statute does not violate the equal protection guarantees. See, e.g.,
President of Georgetown College
v.
Madden,
The Legislature could have rationally concluded that it was proper to place different time limits on the liability of builders from those placed on persons in possession or control as owner, tenant, or otherwise. “[T]here is a valid dis
*716
tinction between persons performing or furnishing the design, planning, supervision, inspection or observation of construction or the construction of an improvement to immovable property and a person in possession or control, as owner, lessor, tenant or otherwise, of such improvement at the time of the incident giving rise to the cause of action. After the date of registry in the mortgage office of acceptance of the work by the owner, there exists the possibility of neglect, abuse, poor maintenance, mishandling, improper modification, or unskilled repair of an improvement to immovable property by the owner, lessor or tenant. It is difficult for the architect or contractor to guard against such occurrences because, after the acceptance by the owner, the architect or contractor ordinarily has neither control of the improvement nor the right to enter or inspect the improvement.”
Burmaster
v.
Gravity Drainage Dist. No. 2 of the Parish of St. Charles,
The Legislature could also have reasonably concluded that it is appropriate to place separate time limits on the liability of builders and suppliers, because they work under dissimilar conditions. “Suppliers and manufacturers, who typically supply and produce components in large quantities, make standard goods and develop standard processes. They can thus maintain high quality control standards in the controlled environment of the factory. On the other hand, the architect or contractor can pre-test and standardize construction designs and plans only in a limited fashion. In addition, the inspection, supervision and observation of construction by architects and contractors involves individual expertise not susceptible to the quality control standards of the factory.”
Burmaster
v.
Gravity Drainage Dist. No. 2 of the Parish of St. Charles,
*717
Further, the Legislature could have reasonably concluded that it is appropriate to limit the liability only of architects and engineers and other design professionals. A limit on liability may be necessary to encourage those professionals to experiment with new designs and materials. “Innovations are usually accompanied by some unavoidable risk. Design creativity might be stifled if architects and engineers labored under the fear that every untried configuration might have unsuspected flaws that could lead to liability decades later.”
O’Brien
v.
Hazelet & Erdal,
Finally, it is well recognized that “[w]hen legislative authority is exerted within a proper area, it need not embrace every conceivable problem within that field. The Legislature may proceed one step at a time, addressing itself to the phase of the problem which seems most acute to the legislative mind.”
Jewel Cos.
v.
Burlington,
We hold that G. L. c. 260, § 2B, does not violate the equal protection guarantees of the United States and Massachusetts Constitutions although it grants immunity only to architects, engineers, contractors and others involved in the design, planning, construction, or general administration of improvements to real property and denies the same protection to materialmen, owners, tenants and others in possession or control. “When local economic regulation that does not burden fundamental rights or is not based upon inherently suspect distinctions is challenged on equal protection grounds, this Court ‘may not sit as a superlegislature to judge the wisdom or desirability of legislative policy determinations . . .; in the local sphere, it is only the
invidious
discrimination, the
wholly
arbitrary act, which cannot stand consistently with the Fourteenth Amendment’ ” (emphasis in original).
Cudahy Co.
v.
Ragnar Benson, Inc.,
*718
3. Application of G. L. c. 260, § 2B, to the plaintiff’s breach of implied and express warranty claims.
The plaintiff claims that the judge should have denied the defendants’ motions for summary judgment because G. L. c. 260, § 2B, does not bar his causes of action for breach of implied and express warranties. We agree with the plaintiff that G. L. c. 260, § 2B, does not apply to contract actions. “[Wjhere the language of the statute is plain and unambiguous,” we need not examine the legislative history. Hoffman v. Howmedica, Inc., 373 Mass. 32, 37 (1977). General Laws c. 260, § 2B, expressly provides a limitation only for actions of tort. Nevertheless, we believe that in this case G. L. c. 260, § 2B, bars the plaintiff’s warranty claims.
As a general rule, “[a]n architect’s efficiency in preparing plans and specifications is tested by the rule of ordinary and reasonable skill usually exercised by one of that profession. . . . [I]n the absence of a special agreement he does not imply or guarantee a perfect plan or satisfactory result.”
Mississippi Meadows, Inc.
v.
Hodson,
Thus, the elements of the plaintiff’s action for negligence and breach of implied warranty are the same.
Audlane Lumber & Builders Supply, Inc.
v.
D.E. Britt Assocs.,
We add that an architect may provide an express warranty of a certain result. In that event, the plaintiff may maintain an action for breach of express warranty. Cf.
Clevenger
v.
Haling,
Judgment affirmed.
Notes
General Laws c. 260, § 2B, inserted by St. 1968, c. 612, provides that no actions of tort “arising out of any deficiency or neglect in the design, planning, construction or general administration of an improvement to real property” shall be commenced “more than six years after the performance or furnishing of such design, planning, construction or general administration.”
Although G. L. c. 260, § 2B, is phrased as if it were a statute of limitations that bars an injured person from commencing an action, its effect *703 is to abolish or abrogate a remedy in tort if the person is injured more than six years after the defendant’s performance or furnishing of the design, planning, construction, or general administration of an improvement to real estate. Recognizing the significant interest the plaintiff has in the outcome of this litigation, we accept the plaintiff’s premise that G. L. c. 260, § 2B, abolishes a remedy in tort and that we should treat his claims on this basis for the purposes of deciding the constitutionality of the statute.
This action was consolidated for trial with the plaintiffs actions against PPG Industries, Inc., Wexler Construction Company, Inc., Salem Glass Company, Inc., M.I.T., Harvard Cooperative Society, John M. Fresina and Richard DeWolfe.
The plaintiff claims that G. L. c. 260, § 2B, violates arts. 1, 10, 11, and 12 of the Massachusetts Declaration of Rights.
6 Articles 1, 10, and 12 of the Massachusetts Declaration of Rights are analogous to the due process clause of the Federal Constitution. See
Pinnick
v.
Cleary,
Six years after the enactment of G. L. c. 260, § 2B, we held that a “builder or contractor may be liable for injuries or damage caused by his negligence to persons with whom he has no contractual relation and even though his work [was] completed and accepted by the owner before the injuries or damage occurred.”
McDonough
v.
Whalen,
In this respect, such an extended period of liability is similar to that imposed on persons in other professions.
Franklin
v.
Albert,
In
McClanahan
v.
American Gilsonite Co.,
In
Franklin
v.
Albert,
We recognize that stale claims do not pose problems for defendants alone. The passage of time also handicaps plaintiffs, who bear the ultimate burden of proving negligence. See
Kallas Millwork Corp.
v.
Square D Co.,
However, it is not our role to determine whether the Legislature acted wisely when it enacted G. L. c. 260, § 2B. See
Commonwealth
v.
Lammi, supra
at 300;
Shell Oil Co.
v.
Revere,
The American Institute of Architects, the National Society of Professional Engineers, and the Associated General Contractors of America drafted a model statute which bars a person from bringing suit to recover damages for deficiencies in the design, planning, supervision or observation of construction or construction of an improvement to real property more than four years after the work is substantially completed. Collins, Limitation of Action Statutes for Architects and Builders — An Examination of Constitutionality, 29 Fed’n of Ins. Counsel Q. 41, 46 & n.27 (1978). Most States have enacted special statutes placing time limits on the liability of some persons involved in the construction industry. These time limits range in time from four to fifteen years. Collins, Limitation *711 of Action Statutes for Architects and Builders — An Examination of Constitutionality, supra at 50-51 & n.42. See, e.g., Tenn. Code Ann. § 28-3-202 (1980) (four years); Minn. Stat. Ann. § 541.051 (West Supp. 1981) (fifteen years).
According to evidence presented at the Hearings on H.R. 6527, H.R. 6678, and H.R. 11544 before Subcommittee No. 1 of the House Committee on the District of Columbia, 90th Cong., 1st Sess. 28 (1967), 93% of all claims against architects are brought within six years of the substantial completion of the construction. Collins, Limitation of Action Statutes for Architects and Builders — An Examination of Constitutionality, supra at 47-48 & n.29.
Even if we believed that a longer period should be the rule we would not invalidate the legislation. We note that several States strike the balance at twelve years — a period which according to the evidence presented at the House hearings, encompasses 99 % of the claims. Id. See, e.g., Ill. Ann. Stat. c. 83, § 22.3 (Smith-Hurd Supp. 1981); 42 Pa. Cons. Stat. Ann. § 5536 (Purdon Supp. 1981).
A statute of repose which shifts most of the risk of loss from the members of a particular industry or profession to the general public may violate the due process guarantees, because it does not serve a legitimate public purpose.
Other jurisdictions have said that the Legislature may abolish common law remedies. See, e.g.,
President of Georgetown College
v.
Madden, 505 F.
Supp.
557
(D. Md. 1980), modified,
In
Pinnick v. Cleary,
The plaintiff argues that G. L. c. 260, § 2B, violates the equal protection guarantees, because it classifies defendants into two groups; those granted immunity by the statute and those excluded from the statute’s protection. Although the plaintiff does not belong to either group, he has standing to raise this issue. This case is distinguishable from
Paro
v.
Longwood
Hosp.,
A few courts have said that an architect impliedly warrants that his work is fit for its intended use. See, e.g.,
Hill
v.
Polar Pantries,
In other circumstances, we have said that breach of warranty claims are so similar to actions in tort that they are subject to statutes expressly
*720
governing tort claims. See, e.g.,
Wolfe
v.
Ford Motor Co., ante
95, 98-99 (1982) (implied warranty);
Salem Orthopedic Surgeons, Inc.
v.
Quinn,
